Calculator Inputs
Example Data Table
This example uses a 100 kg working weight for 5 reps across 3 work sets, with a 20 kg bar and 2.5 kg rounding.
| Set | Percent | Rounded Weight | Reps | Tonnage |
|---|---|---|---|---|
| Bar Only | 20.0% | 20 kg | 10 | 200 |
| Warmup 1 | 40.0% | 40 kg | 8 | 320 |
| Warmup 2 | 55.0% | 55 kg | 5 | 275 |
| Warmup 3 | 70.0% | 70 kg | 3 | 210 |
| Warmup 4 | 82.5% | 82.5 kg | 1 | 82.5 |
| Working Sets | 85.7% of estimated 1RM | 100 kg | 5 × 3 | 1500 |
Formula Used
The calculator builds warmup sets from your working weight, then rounds each load to your selected plate increment. It also estimates session tonnage and intensity.
Estimated 1RM = Working Weight × (1 + Working Reps / 30)
Warmup Target Weight = Working Weight × Warmup Percentage
Rounded Warmup Weight = round(Warmup Target Weight / Increment) × Increment
Warmup Tonnage = Σ(Rounded Warmup Weight × Warmup Reps)
Working Tonnage = Working Weight × Working Reps × Working Sets
Total Session Tonnage = Warmup Tonnage + Working Tonnage
Working Intensity % = (Working Weight / Estimated 1RM) × 100
If the rounded warmup weight falls below bar weight, the calculator uses the bar weight instead. A separate bar-only set can also be added before percentage-based warmups.
How to Use This Calculator
- Enter the exercise, unit, working weight, reps, and number of work sets.
- Add your optional estimated 1RM, or leave it blank for automatic estimation.
- Set the bar weight and the rounding increment used in your gym.
- Enter warmup percentages and matching reps as comma-separated values.
- Choose whether to include a separate bar-only set and specify its reps.
- Click the calculate button to view results above the form.
- Review the warmup ladder, tonnage, and chart, then export CSV or PDF if needed.
Frequently Asked Questions
1. What does this warmup set calculator do?
It converts your planned working weight into a structured warmup ladder. The tool estimates intermediate loads, rounds them to available equipment, totals tonnage, and shows how your warmup progresses toward the main working sets.
2. Should warmup percentages be based on working weight or 1RM?
This calculator uses working weight for warmup percentages because most gym warmups are built around the day’s target load. That keeps progression practical, especially when fatigue, recovery, or program goals change from session to session.
3. Why is there an optional estimated 1RM field?
The 1RM field helps estimate training intensity. If you leave it blank, the calculator derives an estimate from your working weight and reps. This is useful for monitoring how heavy the session is relative to your maximum strength.
4. Why does the calculator round weights?
Most lifters train with fixed plate jumps, not exact decimal loads. Rounding makes each set realistic and gym-ready. You can match the rounding increment to your available plates, dumbbells, or machine loading options.
5. When should I include a bar-only set?
Include a bar-only set when you need extra movement rehearsal, joint preparation, or technical practice before heavier loading. It is especially useful for squats, presses, Olympic lifts, and sessions performed early in the day.
6. What is tonnage, and why does it matter?
Tonnage is total lifted load across sets and reps. It helps track session workload, compare training days, and manage fatigue. Warmup tonnage also shows whether your preparation volume is efficient or unnecessarily exhausting.
7. Can I use this for dumbbells or machines?
Yes. Enter the working load, the machine start weight or dumbbell jump, and the rounding increment that matches your equipment. The logic still works as long as your warmup percentages and reps reflect your exercise setup.
8. How many warmup sets should I use?
That depends on exercise complexity, training age, target intensity, and how prepared you feel. Heavy compound lifts often benefit from more gradual steps, while lighter accessory work usually needs fewer warmup sets.