Free Online Calculators
19 calculators for money, dates and health. Type your numbers and see the result instantly.
Money
🏦
Loan Calculator
Monthly payment and total interest, 3 repayment types
📈
Compound Interest Calculator
Growth with monthly contributions, rule of 72
🐷
Savings Interest Calculator
Deposit and monthly savings plan interest
💱
Currency Converter
Live exchange rates with card or bank fees
🧾
VAT & Sales Tax Calculator
Add or remove tax at any rate
🏷️
Profit Margin Calculator
Margin vs markup and target selling price
💹
Stock Profit Calculator
Return after broker fees and taxes
🪣
Average Cost Calculator
Average down and shares needed
Everyday
💯
Percentage Calculator
X% of Y, percent change, discounts
🎂
Age Calculator
Exact age in years, months and days
🗓️
Date Calculator
Days between dates, add days, weekdays
⏳
Days Until Countdown
Countdown, 100 days and anniversaries
🔄
Unit Converter
Length, weight, area, temperature, volume, data
🎓
GPA Calculator
4.0 scale with letter grades and credits
Health
Frequently asked questions
Are these calculators free?
Yes. Every calculator is free with no sign-up, and the math runs in your browser so nothing you type is sent to us.
Which currency do the money calculators use?
They work with any currency. Enter amounts in dollars, euros, pounds or anything else; the result uses the same unit. The currency converter uses live exchange rates.
Are the health calculators medical advice?
No. BMI, calorie, ovulation and due date results are estimates based on standard formulas. Talk to a doctor for decisions about your health.