Compound Interest Calculator
Estimate compound growth with flexible compounding, deposits, withdrawals, timing, and annual contribution increases.
Directory
All calculators
Finance
Money calculators for interest, loans, tax, discounts, savings, and repayments.
Daily Compound Interest Calculator
Model daily compounding with selectable weekdays, reinvestment rate, deposits, withdrawals, and a start date.
Life Insurance Cover Calculator
Estimate an illustrative life insurance cover amount from dependants, income replacement, housing, debts, savings, existing cover, and assets.
Loan Repayment Calculator
Calculate estimated loan payments and total interest for a fixed-rate loan.
Credit Card Repayment Calculator
Compare minimum credit card payments with a fixed monthly repayment to estimate payoff time and interest.
Debt Payoff Planner
Compare avalanche and snowball debt payoff strategies using multiple balances, APRs, and minimum payments.
Savings Goal Calculator
Find how much you need to save each month to reach a target.
VAT Calculator
Add or remove VAT from a price using any VAT rate.
Percentage Increase Calculator
Calculate percentage increase or decrease between two values.
Discount Calculator
Calculate sale price, savings, and final cost after a discount.
Property
Property calculators for mortgages, stamp duty, moving costs, loan-to-value, and commercial property tax.
Mortgage Calculator
Estimate monthly mortgage repayments from price, deposit, rate, and term.
Mortgage Overpayment Calculator
Estimate how much mortgage interest and time you could save with regular or lump-sum overpayments.
Stamp Duty Calculator
Estimate UK residential property transaction tax for England, Northern Ireland, Scotland, and Wales.
Loan-to-Value Calculator
Calculate mortgage loan-to-value from a property value, deposit, loan amount, or target LTV.
Offset Mortgage Calculator
Compare a standard mortgage with an offset mortgage using savings, rates, fees, tax band, and term.
Moving Costs Calculator
Estimate UK buying, selling, and moving costs including property tax, conveyancing, estate agent fees, surveys, removals, and contingency.
Commercial Lease Stamp Duty Calculator
Estimate stamp duty on a commercial lease from annual rent, lease term, location, and optional premium.
Commercial Stamp Duty Calculator
Estimate UK commercial and non-residential property purchase tax for England, Northern Ireland, Scotland, and Wales.
Investing & Trading
Investment and trading calculators for returns, dividends, position sizing, and risk planning.
CAGR Calculator
Calculate annualized growth from a starting value, ending value, and holding period.
Investment Return Calculator
Estimate net investment return after sale value, income, fees, and holding period.
Dividend Yield Calculator
Calculate dividend yield from share price, dividend amount, and payment frequency.
Stock Profit / Loss Calculator
Calculate gross and net stock trade profit or loss after quantity and fees.
Position Size Calculator
Calculate trade size from account balance, risk percentage, entry price, and stop-loss.
Risk / Reward Calculator
Compare entry, stop-loss, and target prices to estimate risk/reward ratio.
Stop Price Calculator
Calculate a stop-loss price from the current price and a selected downside percentage.
Trade Exit Calculator
Calculate a target exit price from purchase price and a small percentage gain.
Health & Fitness
Practical health and fitness calculators for body metrics, calories, hydration, and wellness planning.
BMI Calculator
Calculate body mass index from height and weight.
Calorie Calculator
Estimate daily calorie needs using age, sex, height, weight, and activity.
Body Fat Percentage Calculator
Estimate body fat percentage using the U.S. Navy method.
Water Intake Calculator
Estimate daily water intake from body weight and activity.
Math
Everyday maths calculators for percentages, fractions, ratios, averages, and square roots.
Standard Calculator
Use a simple keypad calculator for everyday arithmetic, percentages, decimals, and quick totals.
Percentage Calculator
Calculate a percentage of a number, what percent one number is of another, or percent change.
Fraction Calculator
Add, subtract, multiply, or divide two fractions.
Ratio Calculator
Simplify a ratio or scale it to a new total.
Average Calculator
Calculate mean, sum, count, minimum, and maximum from a list of numbers.
Square Root Calculator
Calculate the square root of a positive number.
Date & Time
Date and time tools for ages, date differences, and duration calculations.
Conversion & Utility
Unit converter families, popular unit conversions, and practical everyday utility calculators.
Unit Converter
Convert common length, weight, and temperature units.
Currency Converter
Convert currencies using daily indicative exchange rates, with manual-rate fallback.
Password Generator
Generate a random password with length, character-set, and ambiguous-character controls.
Tip Calculator
Calculate tip amount, total bill, and split cost per person.
Fuel Cost Calculator
Estimate trip fuel cost from distance, efficiency, and fuel price.
Length Converter
Convert metric, imperial, and nautical length units.
Centimeters to Inches Converter
Convert centimeters to inches with a quick formula, example, and conversion table.
Inches to Centimeters Converter
Convert inches to centimeters with a quick formula, example, and conversion table.
Millimeters to Inches Converter
Convert millimeters to inches with a quick formula, example, and conversion table.
Inches to Millimeters Converter
Convert inches to millimeters with a quick formula, example, and conversion table.
Meters to Feet Converter
Convert meters to feet with a quick formula, example, and conversion table.
Feet to Meters Converter
Convert feet to meters with a quick formula, example, and conversion table.
Kilometers to Miles Converter
Convert kilometers to miles with a quick formula, example, and conversion table.
Miles to Kilometers Converter
Convert miles to kilometers with a quick formula, example, and conversion table.
Meters to Centimeters Converter
Convert meters to centimeters with a quick formula, example, and conversion table.
Centimeters to Meters Converter
Convert centimeters to meters with a quick formula, example, and conversion table.
Kilometers to Meters Converter
Convert kilometers to meters with a quick formula, example, and conversion table.
Meters to Kilometers Converter
Convert meters to kilometers with a quick formula, example, and conversion table.
Millimeters to Meters Converter
Convert millimeters to meters with a quick formula, example, and conversion table.
Meters to Millimeters Converter
Convert meters to millimeters with a quick formula, example, and conversion table.
Yards to Meters Converter
Convert yards to meters with a quick formula, example, and conversion table.
Feet to Centimeters Converter
Convert feet to centimeters with a quick formula, example, and conversion table.
Weight and Mass Converter
Convert common metric, imperial, and US customary weight and mass units.
Kilograms to Pounds Converter
Convert kilograms to pounds with a quick formula, example, and conversion table.
Pounds to Kilograms Converter
Convert pounds to kilograms with a quick formula, example, and conversion table.
Grams to Ounces Converter
Convert grams to ounces with a quick formula, example, and conversion table.
Ounces to Grams Converter
Convert ounces to grams with a quick formula, example, and conversion table.
Milligrams to Grams Converter
Convert milligrams to grams with a quick formula, example, and conversion table.
Metric Tons to Pounds Converter
Convert metric tons to pounds with a quick formula, example, and conversion table.
Stone to Kilograms Converter
Convert stone to kilograms with a quick formula, example, and conversion table.
Pounds to Ounces Converter
Convert pounds to ounces with a quick formula, example, and conversion table.
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin temperatures.
Celsius to Fahrenheit Converter
Convert celsius to fahrenheit with a quick formula, example, and conversion table.
Fahrenheit to Celsius Converter
Convert fahrenheit to celsius with a quick formula, example, and conversion table.
Celsius to Kelvin Converter
Convert celsius to kelvin with a quick formula, example, and conversion table.
Kelvin to Celsius Converter
Convert kelvin to celsius with a quick formula, example, and conversion table.
Area Converter
Convert metric, imperial, and land area units.
Acres to Square Feet Converter
Convert acres to square feet with a quick formula, example, and conversion table.
Square Feet to Acres Converter
Convert square feet to acres with a quick formula, example, and conversion table.
Square Meters to Square Feet Converter
Convert square meters to square feet with a quick formula, example, and conversion table.
Square Feet to Square Meters Converter
Convert square feet to square meters with a quick formula, example, and conversion table.
Hectares to Acres Converter
Convert hectares to acres with a quick formula, example, and conversion table.
Square Centimeters to Square Inches Converter
Convert square centimeters to square inches with a quick formula, example, and conversion table.
Square Kilometers to Square Miles Converter
Convert square kilometers to square miles with a quick formula, example, and conversion table.
Volume Converter
Convert metric, US customary, imperial, and kitchen volume units.
Liters to US Gallons Converter
Convert liters to us gallons with a quick formula, example, and conversion table.
US Gallons to Liters Converter
Convert us gallons to liters with a quick formula, example, and conversion table.
Milliliters to US Cups Converter
Convert milliliters to us cups with a quick formula, example, and conversion table.
US Cups to Milliliters Converter
Convert us cups to milliliters with a quick formula, example, and conversion table.
Milliliters to US Fluid Ounces Converter
Convert milliliters to us fluid ounces with a quick formula, example, and conversion table.
US Pints to Liters Converter
Convert us pints to liters with a quick formula, example, and conversion table.
Cubic Meters to US Gallons Converter
Convert cubic meters to us gallons with a quick formula, example, and conversion table.
US Quarts to Liters Converter
Convert us quarts to liters with a quick formula, example, and conversion table.
Speed Converter
Convert road, running, aviation, and scientific speed units.
Miles Per Hour to Kilometers Per Hour Converter
Convert miles per hour to kilometers per hour with a quick formula, example, and conversion table.
Kilometers Per Hour to Miles Per Hour Converter
Convert kilometers per hour to miles per hour with a quick formula, example, and conversion table.
Meters Per Second to Miles Per Hour Converter
Convert meters per second to miles per hour with a quick formula, example, and conversion table.
Knots to Kilometers Per Hour Converter
Convert knots to kilometers per hour with a quick formula, example, and conversion table.
Time Unit Converter
Convert seconds, minutes, hours, days, weeks, months, and years.
Hours to Minutes Converter
Convert hours to minutes with a quick formula, example, and conversion table.
Days to Hours Converter
Convert days to hours with a quick formula, example, and conversion table.
Weeks to Days Converter
Convert weeks to days with a quick formula, example, and conversion table.
Years to Months Converter
Convert years to months with a quick formula, example, and conversion table.
Data Storage Converter
Convert decimal and binary digital storage units.
Megabytes to Gigabytes Converter
Convert megabytes to gigabytes with a quick formula, example, and conversion table.
Gigabytes to Megabytes Converter
Convert gigabytes to megabytes with a quick formula, example, and conversion table.
Megabytes to Mebibytes Converter
Convert megabytes to mebibytes with a quick formula, example, and conversion table.
Bytes to Kilobytes Converter
Convert bytes to kilobytes with a quick formula, example, and conversion table.
Angle Converter
Convert degrees, radians, gradians, arcminutes, and arcseconds.
Degrees to Radians Converter
Convert degrees to radians with a quick formula, example, and conversion table.
Radians to Degrees Converter
Convert radians to degrees with a quick formula, example, and conversion table.
Pressure Converter
Convert pascals, bars, PSI, atmospheres, torr, and millimeters of mercury.
Pounds Per Square Inch to Bar Converter
Convert pounds per square inch to bar with a quick formula, example, and conversion table.
Bar to Pounds Per Square Inch Converter
Convert bar to pounds per square inch with a quick formula, example, and conversion table.
Standard Atmospheres to Pascals Converter
Convert standard atmospheres to pascals with a quick formula, example, and conversion table.
Kilopascals to Pounds Per Square Inch Converter
Convert kilopascals to pounds per square inch with a quick formula, example, and conversion table.
Energy Converter
Convert joules, calories, watt-hours, kilowatt-hours, BTU, and foot-pounds.
Kilowatt-hours to Joules Converter
Convert kilowatt-hours to joules with a quick formula, example, and conversion table.
Joules to Kilowatt-hours Converter
Convert joules to kilowatt-hours with a quick formula, example, and conversion table.
Calories to Joules Converter
Convert calories to joules with a quick formula, example, and conversion table.
Kilocalories to Kilojoules Converter
Convert kilocalories to kilojoules with a quick formula, example, and conversion table.
Power Converter
Convert watts, kilowatts, megawatts, horsepower, and BTU per hour.
Mechanical Horsepower to Kilowatts Converter
Convert mechanical horsepower to kilowatts with a quick formula, example, and conversion table.
Kilowatts to Mechanical Horsepower Converter
Convert kilowatts to mechanical horsepower with a quick formula, example, and conversion table.
Force Converter
Convert newtons, kilonewtons, dynes, pound-force, and kilogram-force.
Newtons to Pounds-force Converter
Convert newtons to pounds-force with a quick formula, example, and conversion table.
Pounds-force to Newtons Converter
Convert pounds-force to newtons with a quick formula, example, and conversion table.
Fuel Consumption Converter
Convert fuel economy and consumption units used in the US, UK, and metric regions.
Liters Per 100 Kilometers to Miles Per US Gallon Converter
Convert liters per 100 kilometers to miles per us gallon with a quick formula, example, and conversion table.
Miles Per US Gallon to Liters Per 100 Kilometers Converter
Convert miles per us gallon to liters per 100 kilometers with a quick formula, example, and conversion table.
USD to GBP Converter
Convert USD to GBP using daily indicative exchange rates, with manual-rate fallback.
GBP to USD Converter
Convert GBP to USD using daily indicative exchange rates, with manual-rate fallback.
USD to EUR Converter
Convert USD to EUR using daily indicative exchange rates, with manual-rate fallback.
EUR to USD Converter
Convert EUR to USD using daily indicative exchange rates, with manual-rate fallback.
GBP to EUR Converter
Convert GBP to EUR using daily indicative exchange rates, with manual-rate fallback.
EUR to GBP Converter
Convert EUR to GBP using daily indicative exchange rates, with manual-rate fallback.
USD to CAD Converter
Convert USD to CAD using daily indicative exchange rates, with manual-rate fallback.
CAD to USD Converter
Convert CAD to USD using daily indicative exchange rates, with manual-rate fallback.
USD to AUD Converter
Convert USD to AUD using daily indicative exchange rates, with manual-rate fallback.
AUD to USD Converter
Convert AUD to USD using daily indicative exchange rates, with manual-rate fallback.
USD to NZD Converter
Convert USD to NZD using daily indicative exchange rates, with manual-rate fallback.
NZD to USD Converter
Convert NZD to USD using daily indicative exchange rates, with manual-rate fallback.
USD to JPY Converter
Convert USD to JPY using daily indicative exchange rates, with manual-rate fallback.
JPY to USD Converter
Convert JPY to USD using daily indicative exchange rates, with manual-rate fallback.
USD to INR Converter
Convert USD to INR using daily indicative exchange rates, with manual-rate fallback.
INR to USD Converter
Convert INR to USD using daily indicative exchange rates, with manual-rate fallback.
USD to ZAR Converter
Convert USD to ZAR using daily indicative exchange rates, with manual-rate fallback.
ZAR to USD Converter
Convert ZAR to USD using daily indicative exchange rates, with manual-rate fallback.
GBP to AUD Converter
Convert GBP to AUD using daily indicative exchange rates, with manual-rate fallback.
AUD to GBP Converter
Convert AUD to GBP using daily indicative exchange rates, with manual-rate fallback.
GBP to CAD Converter
Convert GBP to CAD using daily indicative exchange rates, with manual-rate fallback.
CAD to GBP Converter
Convert CAD to GBP using daily indicative exchange rates, with manual-rate fallback.
GBP to NZD Converter
Convert GBP to NZD using daily indicative exchange rates, with manual-rate fallback.
NZD to GBP Converter
Convert NZD to GBP using daily indicative exchange rates, with manual-rate fallback.
Home & Lifestyle
Everyday home, DIY, food, and lifestyle calculators for practical planning.
Bills & Utilities
Household bill calculators for energy, water, tariffs, standing charges, meter readings, and appliance running costs.
UK Energy Bill Calculator
Estimate a UK electricity or dual-fuel bill from kWh usage, unit rates, standing charges, and billing days.
UK Gas Meter Reading Calculator
Convert UK gas meter readings from metric or imperial units into kWh and estimate the gas bill cost.
UK Energy Tariff Comparison Calculator
Compare two UK energy tariffs using usage, unit rates, standing charges, and one-off fees or credits.
Economy 7 Break-even Calculator
Compare a single-rate electricity tariff with Economy 7 and find the off-peak usage needed to break even.
Appliance Running Cost Calculator
Calculate how much an appliance costs to run from watts, runtime, usage frequency, and p/kWh electricity rate.
UK Water Bill Calculator
Estimate a UK water bill for metered, unmetered rateable-value, or assessed-charge billing.
Business
Business calculators for pricing, profit, margins, productivity, and simple planning.
AI
AI calculators for token estimates, API pricing, model costs, and prompt planning.
AI Token & Cost Calculator
Estimate AI input tokens, output tokens, and API cost from pasted text, known token counts, provider presets, or custom rates.
AI Context Window Calculator
Check whether prompts, chat history, retrieved context, and reserved output fit inside common AI model context windows.
AI Chatbot Monthly Cost Calculator
Estimate monthly AI chatbot API costs from users, conversations, messages, token usage, and model pricing.
AI Batch Cost Calculator
Estimate total and per-item AI cost for bulk processing jobs, including retry or error-rate adjustments.
AI Document Processing Cost Calculator
Estimate AI cost per document and total document processing cost from pages, words, manual token counts, prompt overhead, and output size.
AI Image Generation Cost Calculator
Estimate total AI image generation cost from a pricing preset, image count, variants, retry rate, or custom per-image cost.
Engineering & Science
Engineering and science calculators for formulas, measurements, and technical estimates.
Statistics
Statistics calculators for averages, variation, probability, samples, and data summaries.
Entertainment & Fun
Lightweight calculators for games, chance, hobbies, and quick curiosity checks.
Dice Probability Calculator
Calculate the chance of rolling at least, exactly, or at most a target total with standard dice.
Dice Roller
Roll one to six virtual dice with an animated result and clear total.
Coin Flip
Flip a virtual coin with a simple animated heads-or-tails result.
Random Card Draw
Draw a random card from a standard 52-card deck without replacement during the session.
Lottery Number Generator & Odds Calculator
Generate lottery numbers and calculate jackpot and prize-tier odds for common lottery formats.
Travel & Transportation
Travel and transportation calculators for trips, journey time, vehicle planning, and running costs.
Travel Time Calculator
Estimate journey duration, arrival time, and average speed from distance, speed, breaks, and departure time.
Car Loan Payment Calculator
Estimate a monthly car loan payment from vehicle price, down payment, trade-in equity, APR, term, tax, and fees.
Car Affordability Calculator
Work backward from a target monthly payment to estimate an affordable vehicle price.
Cost Per Mile Calculator
Estimate vehicle running cost per mile from annual mileage, fuel, insurance, tax, maintenance, repairs, depreciation, and finance interest.
Car Depreciation Calculator
Estimate future vehicle value and value lost using a simple annual depreciation rate and mileage adjustment.
Environment & Sustainability
Sustainability calculators for energy, emissions, waste reduction, and everyday impact estimates.