Sports
Strength Session Volume Calculator
Calculate repetitions and volume load for primary, secondary, and accessory work, total tonnage, average load per rep, time under tension, planned rest, and loaded work-plus-rest duration.
Primary repetitions-
Secondary repetitions-
Accessory repetitions-
Total loaded repetitions-
Primary volume load-
Secondary volume load-
Accessory volume load-
Total session volume load-
Average load per repetition-
Modeled time under tension-
Planned inter-set rest-
Loaded work plus planned rest-
Decision view
Movement tonnage stacks and set-rest matrix
Movement tonnage stacks and set-rest matrixThree movement blocks show sets, reps, load, volume share, time under tension, and the rests that separate—not follow—working sets.
Exact scenario comparisonPrimary lift load (kg) changes while all other entered assumptions remain constant.
| Primary lift load (kg) | Primary repetitions | Secondary repetitions | Accessory repetitions | Total loaded repetitions | Primary volume load | Secondary volume load | Accessory volume load | Total session volume load | Average load per repetition | Modeled time under tension | Planned inter-set rest | Loaded work plus planned rest |
|---|
How to use Strength Session Volume Calculator
- Enter external load consistently in kilograms for all movements.
- Use working sets only, or add warm-up sets as a separate movement category outside this model.
- Estimate actual rep tempo and planned between-set rest for each movement role.
Calculator guide
Understanding Strength Session Volume Calculator
Strength volume is not one number unless movement roles are kept visible. Sets, repetitions, load, rep tempo, and between-set rest describe different programming stresses and should not be collapsed into tonnage alone.
Detailed calculation process
Detailed strength repetition, tonnage, tempo, and rest calculation
The default session contains 5x5 at 100 kg, 4x8 at 60 kg, and 3x12 at 20 kg.
General formula: N_i=s_i*r_iV_i=N_i*l_iN=sum(N_i)V=sum(V_i)L=V/NT_u=N*t_rT_b=sum(max(0,s_i-1)*q_i)T=T_u+T_b Each movement's repetitions and tonnage are calculated independently. Time under tension uses all reps, while rest occurs only between sets in the same movement.
What each symbol means
Worked substitution with the default inputs
The default session totals 5,140 kg across 93 reps, averaging 55.27 kg per repetition.
Worked situations
Practical examples
- Five sets of five at 100 kg create 25 reps and 2,500 kg of primary volume load.
- Four sets of eight at 60 kg add 1,920 kg; three sets of 12 at 20 kg add 720 kg.
Better inputs
Useful tips
- Compare like movements and technique standards across sessions.
- Track proximity to failure separately; tonnage does not capture effort reserve.
- Use time estimates for floor planning, not as a promise of exact session duration.
Before relying on the result
Limitations and common mistakes
- Volume load is external load times reps and is not mechanical work or physiological dose.
- Only three movement blocks and one average rep duration are modeled.
- Setup, warm-up, equipment changes, spotting, unilateral conventions, and unscheduled rest are excluded.
Reference
Key terms
- Volume load
- Sets multiplied by repetitions and external load.
- Time under tension
- Repetitions multiplied by the entered average rep seconds.
- Average load per rep
- Total volume load divided by all loaded repetitions.
Important note
This arithmetic does not determine safe loads or an effective program. Use qualified coaching and appropriate medical guidance where needed.
Frequently asked questions
Should body weight be added?
Only if you have a consistent external-load convention for that movement; the page does not estimate effective body mass.
Why exclude rest after the last set?
The movement block ends after its final set; subsequent setup time is not entered.
Is more tonnage always better?
No. Exercise selection, intensity, fatigue, technique, recovery, and training goal matter.