Jim Wendler’s 5/3/1 program is one of the most enduringly popular structured strength training systems, built around a deliberately conservative “training max” and a repeating three-week percentage wave rather than chasing a true 1-rep max every session. This calculator converts a current 1-rep max into the training max and all three weekly percentage targets the program is built around.
Below the calculator you’ll find the exact training max formula with a worked example, why the program deliberately undershoots your true max, how the three-week percentage wave actually works, a full percentage reference table, common mistakes when running 5/3/1, and an expanded FAQ.
5/3/1 Calculator
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The Formula: Training Max and Weekly Percentages
Training Max (TM) = 1-Rep Max × 0.90. Each week’s working sets are then calculated as a percentage of this training max, not your true 1RM. Week 1 uses 65%, 75%, and 85% of TM across three sets. Week 2 uses 70%, 80%, and 90%. Week 3 (often called the “5/3/1 week”) uses 75%, 85%, and 95%, with the final set of each week typically performed for as many reps as possible.
Worked example: a 225 lb 1-rep max. Training Max = 225 × 0.90 = 202.5, rounding to 203 lb. Week 1 sets = 65% (132 lb), 75% (152 lb), 85% (173 lb) of that 203 lb training max — noticeably lighter than working directly off the true 225 lb max, which is exactly the program’s intended, deliberate conservatism.
Why the Program Deliberately Undershoots Your True Max
Basing every week’s percentages off 90% of your true max, rather than 100%, builds in a deliberate buffer that makes every prescribed set genuinely achievable with good form, even on a day when you’re not feeling your absolute best. This conservative starting point is central to the program’s long-term philosophy: slow, sustainable progress through small, incremental training max increases beats chasing an unsustainable, overly aggressive max every single cycle.
Because the training max stays intentionally below the true max, lifters following the program correctly can hit all prescribed reps consistently, which builds genuine confidence and technical consistency under the bar, rather than grinding through borderline-failed reps on a regular basis.
How the Three-Week Percentage Wave Works
Each three-week wave (often followed by a lighter deload week) progressively increases intensity while decreasing the target rep count on the final set: Week 1 typically targets 5+ reps on the last set, Week 2 targets 3+ reps, and Week 3 targets just 1+ rep on that final, heaviest set. This structure lets a lifter push a genuine personal best on that last set of Week 3 specifically, once the training max has been correctly dialed in.
After completing a full wave, most versions of the program call for increasing the training max by a small, fixed increment (commonly 5 lb for lower-body lifts and 2.5-5 lb for upper-body lifts) before starting the next cycle, keeping long-term progress slow but genuinely sustainable.
5/3/1 Percentage Reference Table
These are the exact percentages of training max used across the standard three-week wave:
| Week | Set 1 | Set 2 | Set 3 (AMRAP) |
|---|---|---|---|
| Week 1 | 65% | 75% | 85% |
| Week 2 | 70% | 80% | 90% |
| Week 3 | 75% | 85% | 95% |
The Four Main Lifts and How the Program Structures a Week
The original 5/3/1 program centers on four main compound lifts — squat, bench press, deadlift, and overhead press — each assigned its own training max and its own day within a standard four-day weekly split. Each main lift’s session typically opens with that lift’s percentage-based working sets, followed by supplemental and accessory work chosen to support the lifter’s specific goals, whether that’s general strength, hypertrophy, or athletic performance.
This structure means a lifter is cycling all four lifts simultaneously, each on its own three-week percentage wave, rather than focusing intensely on a single lift at a time — a deliberate design choice that keeps overall training balanced across the whole body throughout a full training cycle.
Popular Variations and Add-Ons to the Base Program
Since its original publication, 5/3/1 has spawned numerous popular variations and supplemental templates, including versions that add extra volume through “First Set Last” (repeating the first set’s weight for extra volume sets) or boring-but-big style supplemental work performed at a flat percentage after the main working sets. Many lifters also layer in a structured accessory framework addressing specific weak points or hypertrophy goals alongside the core percentage-based main lift work.
Despite these many variations, the core training max and three-week percentage wave calculated by this tool remains the consistent foundation underlying essentially every version of the program, which is exactly why getting that foundational calculation right matters regardless of which specific template a lifter ultimately follows.
Common Mistakes When Running 5/3/1
The most common mistake is calculating percentages off a true 1-rep max instead of the 90% training max — this defeats the program’s built-in conservatism and quickly leads to grinding, missed reps, and stalled progress. Always calculate every weekly percentage from the training max, never directly from your actual 1RM.
Another common mistake is increasing the training max too aggressively between cycles, or skipping deload weeks entirely — both undermine the program’s core principle of slow, sustainable, injury-conscious long-term progress rather than rapid short-term gains that eventually stall out.
FAQ
How often should I test a true 1-rep max on this program?
Many lifters retest their true max only every few months, instead using AMRAP set performance on Week 3 to estimate ongoing progress without needing frequent, fatiguing true max attempts.
What barbell increments should I round working weights to?
Most lifters round to the nearest 5 lb (or 2.5 kg) available plate combination, since exact percentage calculations rarely land on a loadable barbell weight.
Is 5/3/1 suitable for beginners?
It can work for beginners, though many coaches suggest a faster linear progression program initially, switching to 5/3/1 once beginner-level rapid gains naturally start to slow down.
What’s a deload week and why does the program include one?
A deload week uses significantly reduced weights and volume to allow recovery, typically scheduled after every third or fourth week, helping prevent accumulated fatigue and injury risk over a long training cycle.
Should I increase the training max the same amount for every lift?
No — many versions of the program recommend meaningfully larger increments for lower-body lifts like squat and deadlift than for upper-body lifts like bench press and overhead press.
What happens if I fail to complete the prescribed reps on a set?
A missed rep target on an easier set usually just signals fatigue or an off day, while repeated failures across multiple sessions is a clear sign the training max was set too high and should be recalculated lower.
Can I use 5/3/1 percentages for accessory exercises too?
Not typically — the percentage-based structure is designed specifically for the four main compound lifts, while accessory work is usually programmed separately using straightforward sets and reps.
Why does the program use a 90% training max instead of some other percentage?
Wendler settled on 90% through extensive personal and coaching experience as a sweet spot that’s conservative enough to ensure consistent success while still being challenging enough to drive genuine progress.
Does the AMRAP set on the final week count toward my actual max?
Not officially, though a strong AMRAP performance is commonly used informally to estimate a new working max for the next training cycle without a separate, dedicated max-testing session.
How long does a full 5/3/1 training cycle typically last?
A standard cycle runs three or four weeks (including an optional deload week), after which the training max is increased slightly and the next cycle begins from that new, higher starting point.
Can women use the same 5/3/1 percentages and structure as men?
Yes — the underlying formula and percentage structure work identically regardless of gender, since everything scales directly from each individual lifter’s own personal 1-rep max.
