Free online calculators for everyday decisions
Precise calculators with step-by-step explanations that make complex numbers easy to understand.
Money & finance
Health & fitness
- BMI calculator
- TDEE Calculator: Daily Calories & Maintenance
- Calorie calculator
- BMI calculator for children
Investing & retirement
Featured calculators
Selected tools for everyday decisions.
Compound interest calculator
Compound interest is interest earned on both your starting amount and interest already added. Choose an annual rate, a term, and a compounding frequency to estimate how a balance may grow.
Open calculatorCalorie calculator
Enter body details for ages 19–78, select activity and a goal, then follow the visible chain from estimated resting energy through activity factor and estimated maintenance to the fixed goal adjustment.
Open calculatorHow much house can I afford
Enter your annual income, monthly debts, down payment, interest rate, and term. The calculator uses the 28/36 affordability rule to estimate the home price, the maximum monthly payment, and the loan it supports.
Open calculatorPercentage calculator
Need help with a percentage? Choose one of three common questions, enter two numbers, and get an answer straight away. The labels tell you whether each number is the percentage, part, whole, old value, or new value.
Open calculatorMore than just results
WiseCalcs goes a step further and explains the why behind every result, so you can make informed decisions with confidence.
- Step-by-step guides to complex financial concepts.
- Science-based health calculations.
- Transparent mathematical models.