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Both calculators run independently — change the inputs on either side to compare results.
Fitness
BMR & TDEE Calculator
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. Use it to set accurate calorie targets for fat loss, maintenance, or muscle gain.
Fill in the required fields to see your result.
Fitness
One Rep Max Calculator
Estimate your one-rep maximum (1RM) — the maximum weight you can lift for a single repetition — from a submaximal set using Epley, Brzycki, Lander, or other established formulas. Use it to design strength-training programs without the injury risk of testing actual maxes.
Fill in the required fields to see your result.
Key differences
| BMR & TDEE Calculator | One Rep Max Calculator | |
|---|---|---|
| Category | Fitness | Fitness |
| Inputs required | 5 | 4 |
| Result | Total Daily Energy Expenditure (calories/day) | Estimated Weight (kg) |
| What it does | Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. Use it to set accurate calorie targets for fat loss, maintenance, or muscle gain. | Estimate your one-rep maximum (1RM) — the maximum weight you can lift for a single repetition — from a submaximal set using Epley, Brzycki, Lander, or other established formulas. Use it to design strength-training programs without the injury risk of testing actual maxes. |