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Calcimator

Running & Cycling Calculator

Comprehensive endurance sports calculator combining pace, speed, heart rate zones, calorie burn, VO2 max estimation, race predictions, and split times. For runners and cyclists of all levels.

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Step 1 of 4

miles/km
How to Use This Calculator
  1. Select Activity Type (Running or Cycling) and your preferred Unit System.
  2. Enter the Distance and your finish time (Hours, Minutes, Seconds).
  3. Input Age, Weight, Gender, and Resting/Max Heart Rate for calorie estimates.
  4. Choose your Split Display unit (per mile or per kilometer).
  5. Review your pace, speed, estimated calories, heart rate zones, and predicted race times.

What each input means

Activity Type
Choose your activity for appropriate calculations.
Unit System
Choose your preferred measurement system.
Distance
Total distance covered.
Hours
Hours component of total time.
Minutes
Minutes component of total time.
Seconds
Seconds component of total time.
Age
Used for heart rate zones and VO2 max calculation.
Weight
Used for calorie calculations.
Gender
Used for VO2 max estimation.
Resting Heart Rate
Measure in the morning before getting up.
Max Heart Rate
Leave at 0 to calculate from age (220 - age).
Split Display
How to display split times.

What each result means

Zone 2 (Aerobic)
Best for building endurance base.
Zone 4 (Threshold)
For improving speed and lactate threshold.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Activity Type = 0, Unit System = 0, Distance = 3.1, Hours = 0 = 12 input(s) provided
  2. Calculate Pace
    Pace
    8:04 = 8:04
  3. Calculate Calories Burned
    Calories Burned
    298 = 298
  4. Calculate Pace
    Pace
    5:01 = 5:01
  5. Calculate Speed
    Speed
    7.44 = 7.44

Engine last updated . Checked against 1 independently-derived test — how we verify calculators.

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