Free, no-nonsense calculators
Quick, free, no-nonsense calculators — percentages, loans, dates, conversions and more. Everything runs in your browser. 20 tools and counting.
Loan, mortgage, interest, salary and tax calculators — work out payments, rates and totals in seconds.
Car Loan Calculator
Free car loan calculator — work out the monthly payment, total cost and total interest on an auto loan from the price, interest rate, and term in years. Runs in your browser.
Compound Interest Calculator
Free compound interest calculator — see what a starting balance grows to over time at a given rate, with annual, quarterly, monthly or daily compounding. Runs in your browser, no sign-up.
Discount Calculator
Free discount and sale price calculator — find the final price and the amount saved on any percentage-off deal. Type the original price and the percent off. Works in your browser.
Mortgage Calculator
Free mortgage calculator — work out your monthly payment, total cost over the life of the loan, and total interest paid. Just enter the loan amount, interest rate and term. Runs in your browser, no sign-up.
Personal Loan Calculator
Free personal loan calculator — work out the fixed monthly payment, total cost, and total interest on an unsecured installment loan from amount, rate, and term in years. Runs in your browser.
ROI Calculator
Free return-on-investment (ROI) calculator — work out the profit and percent return between an initial amount and a final amount. Single-period ROI in your browser.
Simple Interest Calculator
Free simple interest calculator — work out the interest and final balance on a principal at a given rate over time. Uses the I = P × r × t formula. Runs in your browser, no sign-up.
Tip Calculator
Free tip calculator with bill split — type in the bill, pick a tip percentage, and split the total between any number of people. Works in your browser, no sign-up.
BMI, calorie, body-fat and pregnancy calculators to help you track health and fitness numbers.
BMI Calculator
Free BMI calculator — type in weight and height to get your body mass index and the WHO weight category. Runs in your browser, no sign-up. Metric units (kg, cm).
Ideal Weight Calculator
Free ideal body weight calculator using the Devine formula — the reference equation in clinical pharmacology. Metric units (kg, cm). Runs in your browser.
TDEE & BMR Calculator
Free TDEE (Total Daily Energy Expenditure) and BMR calculator — uses the Mifflin-St Jeor equation, the formula clinical dietitians prefer. Metric units (kg, cm). Runs in your browser.
Practical day-to-day calculators: dates, tips, fuel cost, time math and more.
Age Calculator
Free age calculator — type a birthdate and a reference date and get exact age in years, months and days. Defaults to today. Runs in your browser.
Days Between Dates Calculator
Free days between dates calculator — type two dates and get the exact number of calendar days between them. Works in your browser, no sign-up.
Fuel Cost Calculator
Free fuel cost calculator — work out how much a trip will cost in fuel from distance (km), consumption (km/L), and price per litre. Runs in your browser.
Time Duration Calculator
Free time duration calculator — type a start time and end time and get the hours and minutes between them. Handles times that cross midnight. Works in your browser.
Unit Price Calculator
Free unit price calculator — divide price by quantity to find the cost per unit. Lets you compare grocery deals across different sizes. Runs in your browser.
Fast, accurate unit and measurement converters — length, weight, temperature, volume and beyond.
Length Converter
Free length / distance converter between metric (mm, cm, m, km) and imperial (in, ft, yd, mi) units. Uses the international definitions. Works in your browser.
Temperature Converter
Free temperature converter between Celsius (°C), Fahrenheit (°F) and Kelvin (K). Works in your browser, no sign-up.
Weight / Mass Converter
Free weight and mass converter between metric (mg, g, kg, t) and imperial (oz, lb) units. Uses the exact international avoirdupois definitions. Works in your browser.
Percentages, ratios, fractions and other everyday math worked out instantly.