Enter your working weight and the warm-up calculator builds your ramp — bar × 10, then 40% × 8, 60% × 5, 80% × 3, 90% × 1 — rounded to loadable weights, with the exact plates to put on each side of the bar for every set.
| Set | % of work | Weight (lb) | Reps | Plates per side |
|---|---|---|---|---|
| 1 | Bar | 45 | 10 | Bar only |
| 2 | 40% | 90 | 8 | 2 × 10 lb + 1 × 2.5 lb |
| 3 | 60% | 135 | 5 | 1 × 45 lb |
| 4 | 80% | 180 | 3 | 1 × 45 lb + 2 × 10 lb + 1 × 2.5 lb |
| 5 | 90% | 205 | 1 | 1 × 45 lb + 1 × 35 lb |
| Working sets | 225 | — | 2 × 45 lb | |
Weights round to the nearest 5 lb so every set is loadable with standard plates. Sets that round to the same weight are collapsed. Rest 30–90 seconds between warm-up sets — just enough to strip and load plates.
Need the plate math for a different weight? Use the barbell plate calculator, or find your top-end numbers with the 1RM calculator. More free tools →
A good barbell warm-up does two jobs: it rehearses the movement pattern and it prepares your nervous system for heavy load — without accumulating fatigue that steals reps from your working sets. That's why reps DROP as weight climbs: bar × 10 grooves technique, 40% × 8 and 60% × 5 build blood flow and positional confidence, and 80% × 3 plus 90% × 1 prime top-end force output while costing almost nothing.
Percentages are anchored to your WORKING weight, not your 1RM — so the ramp scales automatically whether today is a light hypertrophy day or a heavy top single.
NutriMind tracks every working set, detects when you're ready for more weight, and progresses your program automatically — while its AI nutrition coaching makes sure you're eating enough to actually recover and grow.
Why warm up with percentages instead of fixed jumps?
Percentage-based ramps scale with the day's work. Fixed jumps (say +50 lb per set) give a 135 lb squatter two warm-up sets and a 500 lb squatter eight. Percentages of the working weight give everyone the same 4–5 progressively heavier exposures, which is enough to potentiate without fatiguing.
How many warm-up sets do I need?
For most working weights, 4–5 sets: empty bar, then roughly 40%, 60%, 80%, and 90% of the working weight. Light working weights need fewer — this calculator automatically collapses sets that round to the same weight. Your FIRST lift of a session needs the full ramp; later exercises that use the same muscles usually need only 1–2 feeler sets.
How should I warm up for a 1RM attempt?
Treat your planned opener like the working weight and extend the ramp: after the 90% single, take small jumps (2–5%) with singles and full rest until you reach the attempt. Keep total warm-up reps low — max day fatigue is expensive. Estimate a realistic target first with a 1RM calculator so your jumps are sensible.
Should I rest between warm-up sets?
Only briefly — 30 to 90 seconds, roughly the time it takes to change plates. The exception is the last warm-up single before heavy working sets: take 2–3 minutes there so you start your first work set fully recovered.
Do these percentages include the bar?
Yes. Every weight shown is TOTAL bar weight (bar + plates), and the plates-per-side column already subtracts the bar you selected. Switch between the 20 kg/45 lb and 15 kg/35 lb bars above and the plate math updates.