Calculation tools
About Calculation tools
A free set of calculation tools that run entirely in your browser — covering dates and durations, percentages and discounts, and BMI. No signup or install, and your input is never sent to a server.
Find the number of days or the span between two dates, work out percentages, discounts, and percentage change, or calculate BMI and a healthy weight range from your height and weight. Handy for everything from work to everyday life, and ideal for anyone who needs quick, accurate results.
All Calculation tools
Date Duration Calculator
Free date duration calculator that counts the days between two dates the moment you enter them. See how many days, plus years, months, weeks, and hours, with an exact years/months/days breakdown. Toggle whether to include the end day, or add and subtract days from a date. Runs entirely in your browser.
- Productivity
- Date & Time
Percentage Calculator
Free percentage calculator: find what percent A is of B, calculate a discount or percent off, add markup or sales tax, and get percentage change. Runs in your browser.
- Productivity
- Lifestyle
BMI Calculator
Free BMI calculator: enter height and weight to get your body mass index, category, and ideal/healthy weight. WHO, Japan, China, Taiwan & Korea standards.
- Productivity
- Lifestyle