Calculators & live data
Everyday questions.
Clear answers.
From your next mortgage to your next morning run. Simple tools to make sense of the numbers.
Find your toolFree to use. No account required.
What's the percentage?
A little math, off your mind.
40 tools. One useful place.
Calculators run in your browser
No sign-ups or subscriptions
A good place to start
Everyday essentials
The tool library
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Finance10
Make your next money decision a little clearer.
Auto Loan Calculator
Calculate monthly car payments and total interest costs.
Compound Interest
Visualize how your savings grow over time with compound interest.
Inflation Calculator
Calculate how the purchasing power of money changes.
Investment Calculator
Project returns on stocks, ETFs, or crypto over time.
Mortgage Calculator
Estimate monthly mortgage payments including tax and insurance.
Retirement Planner
See if you are saving enough to retire comfortably.
Salary Converter
Convert annual salary to hourly, weekly, and monthly pay.
Savings Goal
Calculate monthly savings needed to reach a target.
Simple Loan Calc
Calculate monthly payments and total interest costs.
VAT / Sales Tax
Add or remove tax from any amount instantly.
Health18
Get to know your body, habits, and daily needs.
1-Rep Max Calc
Estimate your maximum strength potential for lifting.
BMI Calculator
Check your Body Mass Index quickly and privately.
Body Fat Calculator
Estimate body fat percentage using the US Navy method.
Caffeine Calculator
See how much caffeine is in your system at bedtime.
Conception Calculator
Find out the likely date your baby was conceived.
Daily Calories (BMR)
Calculate BMR and daily calorie needs (TDEE).
Heart Rate Zones
Optimize cardio with Zone 2 and threshold training.
Ideal Weight
Find your healthy weight range using medical formulas.
Macro Calculator
Calculate protein, carb, and fat targets for your diet.
Pace Calculator
Calculate running pace, time, and distance goals.
Pregnancy Due Date
Estimate your due date and weeks pregnant.
Sleep Calculator
Wake up refreshed by timing your sleep cycles perfectly.
Smoking Cost
Calculate money saved and life regained by quitting.
Steps to Calories
Convert daily walking steps into calories burned.
Waist-to-Hip Ratio
A better indicator of metabolic health than BMI.
Water Intake
Calculate daily hydration needs based on activity.
Weight Loss Predictor
Calculate exactly when you will reach your goal weight.
Wilks Score
Compare strength levels across different body weights.
Math & conversions4
Less mental arithmetic. More getting things done.
Privacy tools2
Small, useful tools that work on your device.
Live dashboards6
A closer look at the world around you.
Air Quality Index
Real-time air pollution data for major cities worldwide.
Bio-Rhythm Analyst
Optimize your energy and sleep schedule based on local sunlight.
Earthquake Monitor
Interactive global map of recent seismic activity.
Health Command Center
Interactive body visualizer with real-time BMI, BMR, and TDEE metrics.
Pollen & Allergy Hub
Real-time pollen breakdown (Grass, Tree, Weed) and AQI forecasts.
Space Weather
Solar flares, geomagnetic storms, and aurora forecast.
Less friction. More clarity.
Useful by design.
Pick a tool, enter your numbers, get an answer.
That's all there is to it.