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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.

Weight Lifted (kg)

Repetitions Performed (reps)

Calculation Method

Target Percentage

Fill in the required fields to see your result.

Fitness

TDEE Calculator

Calculate Total Daily Energy Expenditure (TDEE) by computing BMR via Harris-Benedict equation, then multiplying by an activity factor. Use it as the foundation for evidence-based weight management, sports nutrition, and meal planning.

Body Weight (kg)

Height (cm)

Age (years)

Gender

Activity Level

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Key differences

	One Rep Max Calculator	TDEE Calculator
Category	Fitness	Fitness
Inputs required	4	5
Result	Estimated Weight (kg)	Total Daily Energy Expenditure (calories)
What it does	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.	Calculate Total Daily Energy Expenditure (TDEE) by computing BMR via Harris-Benedict equation, then multiplying by an activity factor. Use it as the foundation for evidence-based weight management, sports nutrition, and meal planning.