Training Percentages: How to Use Your 1RM to Structure Your Strength Programme
Once you know your 1RM, you can train with precision. Here is how the percentages work.
Knowing your one-rep max (1RM) is only useful if you know how to use it. Percentage-based programming links every set and rep scheme to a meaningful fraction of your maximum effort, making your training specific, progressive, and measurable. Here is how it works in practice.
Why percentages matter
Training at random weights produces random results. When you programme by percentage of 1RM, each session has a defined purpose: heavy loads build maximal strength, moderate loads drive hypertrophy, and lighter loads develop speed-strength and technique. The percentage determines what adaptation you are training for.
Percentage-based programming also makes progression trackable. If your squat 1RM increases from 100kg to 110kg, every percentage-based working weight automatically increases in proportion. You do not have to guess; the programme recalibrates itself.
The 1RM percentage chart
The following ranges are widely used in strength and conditioning:
- 90–100% 1RM: Maximum strength. Sets of 1–3 reps. High neural demand. Used for competition or testing weeks.
- 80–90% 1RM: Strength development. Sets of 2–5 reps. The bread and butter of powerlifting and strength programmes.
- 70–80% 1RM: Strength-hypertrophy. Sets of 4–8 reps. Most versatile range for intermediate lifters.
- 60–70% 1RM: Hypertrophy and muscular endurance. Sets of 8–12 reps. Most bodybuilding work falls here.
- 50–60% 1RM: Speed-strength and technique. Sets of 12–20 reps, or dynamic effort work at high velocity.
- Below 50% 1RM: Warm-up, recovery, and skill practice.
How to calculate your working weights
Multiply your 1RM by the target percentage. For a 140kg squat 1RM:
- 80% = 140 × 0.80 = 112kg
- 75% = 140 × 0.75 = 105kg
- 70% = 140 × 0.70 = 98kg
Round to the nearest available plate increment. Minor deviations (1–2%) do not matter; the principle of the percentage still applies.
Use our 1RM calculator to estimate your one-rep max from any recent set, then apply these percentages to build your programme.
A basic strength block: using percentages over 4 weeks
A simple linear progression using percentages might look like this for the squat (3 working sets):
- Week 1: 3 × 5 at 75% 1RM
- Week 2: 3 × 4 at 80% 1RM
- Week 3: 3 × 3 at 85% 1RM
- Week 4: Deload — 2 × 5 at 65% 1RM
- Week 5: Test or attempt new 1RM
This follows the logic of progressive overload: each week the intensity increases while volume decreases, peaking the nervous system for a test week. The deload allows recovery before the attempt.
RPE as a complement to percentages
Rate of Perceived Exertion (RPE) is increasingly used alongside percentages to account for daily variation in performance. A 10-point RPE scale, where RPE 10 is maximum effort and RPE 8 means two reps remaining in reserve, allows you to auto-regulate weights based on how you feel.
On a well-recovered day, 80% might feel like RPE 7. On a poor sleep day, the same weight might be RPE 9. Using RPE allows you to stay in the right stimulus range even when your 1RM fluctuates.
Many advanced programmes combine both: “3 × 3 at 85% or RPE 8, whichever is lighter.” This prevents grinding through sessions on bad days, which accumulates fatigue without benefit.
Re-testing your 1RM: how often?
For most intermediate lifters, testing or estimating 1RM every 8–12 weeks is appropriate. Frequent maximal testing is fatiguing and risks injury. Between test sessions, use calculated 1RM estimates from submaximal sets to track progress.
A set of 5 at a challenging weight gives a reliable 1RM estimate. Our calculator uses the Epley formula as default and offers the Brzycki and Lander alternatives. For most lifters, the estimates are accurate within 2–5% of the true maximum.
Common mistakes with percentage-based programming
The most frequent error is inflating the 1RM used as the base. If you estimate your 1RM optimistically and programme from that number, all your percentages land too heavy — leading to missed reps, poor form, or injury. Start conservative; an under-programmed week is better than a broken training block.
The second common mistake is never retesting. If your 1RM increases but your programming stays based on old numbers, your intensities gradually drift lighter and progress stalls. Update your base 1RM at least every training cycle.