Race Pace Calculator
Running pace per mile and per km, speed, finish time and race-time predictions for 5K to marathon.
Health and Fitness Calculators
Plan training and understand energy use with calculators built on published, widely used equations: the Mifflin-St Jeor equation for resting metabolism and the ACSM walking equation for walking energy cost. Each page explains the equation, what it assumes and how accurate it is likely to be.
These are population-level estimates for general information. They are not medical advice; talk to a qualified professional about your individual health needs.
Running & pace
Pace, speed and finish time.
Calories & energy
Calorie estimates for activity and maintenance.
Maintenance Calories Calculator
Estimate BMR and daily maintenance calories (TDEE) with Mifflin-St Jeor, Harris-Benedict or Katch-McArdle.
Walking Calorie Calculator
Estimate calories burned walking from weight, speed, duration and incline using the ACSM equation.
All calorie numbers are estimates
Predictive equations are derived from groups of people and carry real error for any individual, commonly ±10% or more. Use the results as a starting point and adjust based on how your body weight and energy actually respond over several weeks.
Other calculator categories
Construction Calculators
Estimate concrete, gravel, tile, lumber, block and rebar quantities for your project.
15 calculatorsFinance Calculators
Loan and car payments, amortization, retirement withdrawals and trip costs.
5 calculatorsTime & Date Calculators
Hours worked, decimal time for timesheets, and elapsed time between dates.
3 calculators