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Strength Training Formula

Workout Volume Formula

Volume is sets × reps × weight. It's the rough dial for hypertrophy — most lifters grow on 10–20 hard sets per muscle group per week. The simpler 'hard sets' count (sets to RIR ≤ 2) often beats volume-load for programming.

5 VARIABLESPublished Mar 12, 2026Updated May 10, 2026Live Content
By AI Fit Hub · AI Fit Hub Team
Best Next MoveStrength

Workout Volume Calculator

Calculate total training volume and compare against optimal ranges per muscle group.

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On This Page

Formula 5 variables Worked example Variations

Education · Not medical advice. Output is deterministic math from your inputs.Editorial standardsSponsor disclosureCorrections

Formula

Copy the exact expression or work through it step by step below.

volume_load = sets × reps × weight hard_sets_per_muscle_per_week = Σ(sets where RIR ≤ 2)

Variables

volume_load

Volume load

Kilograms (or pounds) lifted. Useful for tracking session-to-session change at fixed RIR. Less useful for cross-exercise comparison.

sets

Working sets

Sets performed at challenging effort. Warm-up sets don't count toward hypertrophy volume.

reps

Reps per set

Strict reps. The 5–30 rep range produces equivalent hypertrophy when sets are taken close to failure.

weight

Load per rep

Bar weight; use the same unit throughout.

RIR

Reps in Reserve

Subjective effort marker. RIR 0 = failure, RIR 2 = could have done 2 more clean reps. Hypertrophy returns flatten beyond RIR 2 territory.

Step By Step

  1. 1

    Track each working set's reps × weight. Skip warm-ups.

    Bench press: 60×8, 65×8, 70×6, 70×5 → loads 480 + 520 + 420 + 350.

  2. 2

    Sum the session volume load.

    Total: 1,770 kg lifted.

  3. 3

    Separately count hard sets for each muscle worked. A set counts as 'hard' if it ends within 2 reps of failure.

    All 4 bench sets at RIR ≤ 2 → 4 hard sets for chest.

  4. 4

    Sum weekly hard sets per muscle group. Aim 10–20 per muscle per week for hypertrophy; below 10 mostly for maintenance.

    Bench day 4 sets + incline day 5 sets + flyes 4 sets = 13 chest hard sets/week.

Worked Example

Bench session: 60×8, 65×8, 70×6, 70×5

Set 1

60 kg × 8

Set 2

65 kg × 8

Set 3

70 kg × 6

Set 4

70 kg × 5

volume_load = 60·8 + 65·8 + 70·6 + 70·5 = 480 + 520 + 420 + 350 = 1,770 kg

Volume load 1,770 kg, 4 hard sets for chest. Add the rest of the week's chest work to hit 10–20 hard sets total.

Common Variations

Tonnage (sets × reps × weight) and volume load are interchangeable terms.
Effective Reps: count only reps within 5 of failure. Tighter but more useful for hypertrophy than total reps.
Relative volume: divide volume load by 1RM. Lets you compare across lifts of very different absolute loads.

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FAQ

Questions people ask next

The short answers readers usually want after the first pass.

How do you work out training volume?
Volume load is sets x reps x weight. Track each working set's reps and weight (skip warm-ups) and sum them: a bench session of 60x8, 65x8, 70x6, 70x5 is 480 + 520 + 420 + 350 = 1,770 kg. Use volume load to track session-to-session change at a fixed effort level.
What is the difference between volume load and hard sets?
Volume load is sets x reps x weight in kilograms, useful for tracking change over time but weak for comparing across exercises. Hard sets count only the sets taken within 2 reps of failure (RIR 2 or less) per muscle group, and this simpler count often beats volume load for programming. Many lifters track both: total kg lifted plus weekly hard sets per muscle.
How many hard sets per muscle should I do per week?
Most lifters grow on 10-20 hard sets per muscle group per week, with anything below 10 mostly serving maintenance. Sum hard sets across the week, for example 4 bench sets + 5 incline sets + 4 flye sets = 13 chest hard sets. Hypertrophy returns flatten beyond RIR 2, so sets should end within about 2 reps of failure to count.
Does rep range change how much volume I need?
The 5-30 rep range produces equivalent hypertrophy when sets are taken close to failure, so what matters is the number of hard sets, not whether you used heavy low reps or lighter high reps. Tonnage and volume load are interchangeable terms; a tighter alternative is effective reps, counting only reps within about 5 of failure.

Sources & References

General fitness estimates — not medical advice. Consult a healthcare professional for medical decisions.