Compound Interest Calculator
Estimate compound growth with flexible compounding, deposits, withdrawals, timing, and annual contribution increases.
Calcul8.net
Calculate something right now.
Use the standard calculator for quick arithmetic, then jump into specialist tools for finance, fitness, maths, dates, conversions, and everyday decisions.
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.
Moving Costs Calculator
Estimate UK buying, selling, and moving costs including property tax, conveyancing, estate agent fees, surveys, removals, and contingency.
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.
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Calculator categories
Finance
Money calculators for interest, loans, tax, discounts, savings, and repayments.
Property
Property calculators for mortgages, stamp duty, moving costs, loan-to-value, and commercial property tax.
Investing & Trading
Investment and trading calculators for returns, dividends, position sizing, and risk planning.
Health & Fitness
Practical health and fitness calculators for body metrics, calories, hydration, and wellness planning.
Math
Everyday maths calculators for percentages, fractions, ratios, averages, and square roots.
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.
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.
Business
Business calculators for pricing, profit, margins, productivity, and simple planning.
AI
AI calculators for token estimates, API pricing, model costs, and prompt planning.
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.
Travel & Transportation
Travel and transportation calculators for trips, journey time, vehicle planning, and running costs.
Environment & Sustainability
Sustainability calculators for energy, emissions, waste reduction, and everyday impact estimates.
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Each calculator explains the formula, assumptions, and what the output means in plain English.
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