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- BMI Calculator
- TDEE Calculator
- BMR Calculator (Mifflin-St Jeor)
- Reference Weight Formulas
- Waist-to-Hip Ratio Calculator
- Height Converter (cm to feet/inches)
- Weight Converter (kg to lbs)
- Distance Converter (km to miles)
- Speed Converter (MPH to km/h to m/s)
- Grade to Degrees Converter
- FTP Calculator (from 20-Min Test)
- Cycling Power Zones Calculator
- Cycling Power Calculator (Watts from Speed)
- Power-to-Weight Ratio Calculator
- Bike Gear Ratio Calculator
- Steps to Calories
- Calorie Burn: Running
- Calorie Burn: Walking
- Calorie Burn: Cycling
- Calorie Burn: HIIT & Circuit Training
- Max Heart Rate Calculator (220 Minus Age)
- Target Heart Rate Calculator
- Heart Rate Zones (Karvonen Method)
- Heart Rate Zones (% of Max)
- Max Heart Rate Comparison Calculator (4 Formulas)
- Calorie Deficit Planner
- Macro Split Calculator
- Protein Intake Calculator
- Water Intake Calculator
- Caffeine Half-Life Calculator
- Time-to-Goal Calculator (Weight)
- Weight Change Percentage Calculator
- Strength Progression Calculator
- Training Cycle Planner (Weeks/Deload)
- Personal Record Progression Calculator
- Running Pace Calculator
- Beep Test (20 m Shuttle Run)
- Cooper 12-Minute Run Test
- VDOT Calculator (Jack Daniels)
- Marathon Time Predictor
- One-Rep Max Calculator (Epley Formula)
- Barbell Plate Calculator (lbs)
- Strength Standards Calculator
- Barbell Plate Calculator (kg)
- Wilks Score Calculator
Reading
From the blog
Running
Stride Length and Steps Per Mile Explained
A stride is two steps, and getting that factor of two wrong doubles or halves everything built on it. One lap of a track counted at 375 footfalls is worked through to a 106.7 cm step, a 213.3 cm stride and 1,509 steps to the mile.
9 min read
Running
Marathon Pacing: How to Split 42.195 km
A goal time divided by 42.195 km is one number; a pacing chart is that number laid out against every marker on the course. This guide works a 3:45:00 marathon through to 5:20 min/km (8:35 min/mile) and a full checkpoint table, shows why the unrounded pace has to survive to the last multiplication, and separates what the arithmetic settles from what it leaves to the race.
10 min read
Running
Treadmill Pace vs Outdoor Pace (and Incline Adjustments)
A treadmill shows speed and a training plan is written in pace, and the two are reciprocals: 60 divided by the belt speed. This guide works a 12.0 km/h belt through to 5:00 min/km and 8:03 min/mile, explains where the 1 per cent incline figure comes from and the speed range it was measured in, and keeps the exact unit conversion separate from the estimated effort comparison.
9 min read