How accurate are 1RM calculators?

1RM calculators are generally accurate within 5-10% when used with rep ranges under 10. The accuracy depends on factors like training experience, muscle fiber composition, and the specific formula used. Our calculator uses 7 different formulas to give you the most comprehensive estimate.

Which 1RM formula is most accurate?

The Epley formula is most widely used and accurate for most people, especially with rep ranges of 2-10. However, different formulas work better for different individuals. Brzycki tends to be conservative, while Lombardi works well for powerlifters. Our calculator shows all 7 formulas so you can compare.

Can I use this for any exercise?

Yes, you can use 1RM calculators for any compound exercise like bench press, squat, deadlift, overhead press, and rows. The formulas are based on general strength principles that apply across exercises, though they're most accurate for compound movements.

What rep range should I use for the most accurate calculation?

For best accuracy, use rep ranges between 2-10 reps. The sweet spot is 3-8 reps where most formulas perform optimally. Avoid using very high rep ranges (15+) as the formulas become less reliable due to muscular endurance factors.

How often should I recalculate my 1RM?

Recalculate your 1RM every 4-6 weeks or whenever you notice significant strength gains. For beginners, monthly calculations work well. Advanced lifters might recalculate every 6-8 weeks. Always use recent max effort sets for the most accurate results.

5/3/1 is a strength training program created by Jim Wendler in 2008 that uses 4-week waves built around 4 main lifts: bench press, squat, deadlift, and overhead press. Each lift is trained once per week with 3 working sets (the third is an AMRAP — as many reps as possible). The program is built on percentages of a Training Max (TM) — 90% of true 1RM — for safer, sustainable progression.

How does the 5/3/1 calculator work?

Enter your true 1RM for bench, squat, deadlift, and overhead press. The calculator multiplies each by 90% to compute your Training Max, then applies the 5/3/1 percentage scheme: Week 1 (65/75/85% × 5 reps), Week 2 (70/80/90% × 3 reps), Week 3 (75/85/95% with the last set being a 1-rep AMRAP), Week 4 (deload at 40/50/60%). All working set weights round to the nearest 5 lb (or 2.5 kg).

What is a Training Max?

Training Max (TM) is 90% of your true 1RM (or 85% for a more conservative variant). All 5/3/1 percentages are calculated off the TM, not your true max. The 90% buffer accounts for daily fluctuations in strength and lets you hit prescribed reps reliably even on bad training days. The program advances by adding 5 lb (upper body) / 10 lb (lower body) to the TM each cycle, not by re-testing 1RM.

How many cycles before I retest my 1RM?

Wendler recommends running 3-4 cycles (12-16 weeks) before retesting. Track your AMRAP rep counts on Week 3 — those final-set reps are your real progress indicator. If you're hitting 5+ reps with the prescribed 1+ rep target on Week 3 sets consistently, your strength is improving regardless of when you next test 1RM.

Can I add accessories to 5/3/1?

Yes — Wendler's book recommends 25-50 reps of pull, push, and single-leg/core work after main lift sessions. Common assistance templates include "Boring But Big" (5×10 of the same lift at 50-60% TM after main work), "First Set Last" (5×5 at the first working set weight), and "Triumvirate" (2 accessories × 5×10 reps).

Should I use TM 85% or TM 90%?

Use 90% TM as the default — it's what Wendler prescribes in the original book. Drop to 85% TM if you're returning from a layoff, recovering from an injury, or you've been missing AMRAP rep targets for 2+ cycles. Lower TM means more volume completed cleanly, faster long-term progression at the cost of immediate peak loading.

What if I miss a rep on the AMRAP set?

Missing the prescribed minimum reps on a Week 3 AMRAP (1+ at 95% TM) means your TM is too high. Reduce TM by 10% on that lift and continue the cycle. Don't try to grind out a missed rep — the program assumes high-quality reps.

How does 5/3/1 compare to Starting Strength or 5×5?

Starting Strength and StrongLifts 5x5 are linear progression programs aimed at novice lifters who can add weight every workout. 5/3/1 is an intermediate program — it advances on monthly waves rather than weekly. If you can still add weight to the bar every session, 5/3/1 will be too slow. Most lifters switch to 5/3/1 after 6-12 months of linear progression.

Wendler 5/3/1 · 4-week wave

5/3/1 Calculator

Generate your full 4-week Wendler 5/3/1 wave from your 1RMs. Enter bench, squat, deadlift, and overhead press maxes — the calculator computes your Training Max, applies the 5/3/1 percentage scheme, and rounds every working set to a barbell-loadable weight.

Enter your 1RMs

Bench Press 1RM (lb)

Training Max: 205 lb

Back Squat 1RM (lb)

Training Max: 285 lb

Deadlift 1RM (lb)

Training Max: 365 lb

Overhead Press 1RM (lb)

Training Max: 120 lb

Wendler's 5/3/1 uses a Training Max (TM) — typically 90% of true 1RM — as the base for all percentage calculations. Switch to 85% TM if you're prioritizing long-term progression over near-term peak loading.

Week 1 — 5s

Set	% TM	Reps	Bench Press	Back Squat	Deadlift	Overhead Press
Set 1	65%	5	135 lb	185 lb	235 lb	80 lb
Set 2	75%	5	155 lb	215 lb	275 lb	90 lb
Set 3	85%	5+AMRAP	175 lb	240 lb	310 lb	100 lb

Week 2 — 3s

Set	% TM	Reps	Bench Press	Back Squat	Deadlift	Overhead Press
Set 1	70%	3	145 lb	200 lb	255 lb	85 lb
Set 2	80%	3	165 lb	230 lb	290 lb	95 lb
Set 3	90%	3+AMRAP	185 lb	255 lb	330 lb	110 lb

Week 3 — 5/3/1

Set	% TM	Reps	Bench Press	Back Squat	Deadlift	Overhead Press
Set 1	75%	5	155 lb	215 lb	275 lb	90 lb
Set 2	85%	3	175 lb	240 lb	310 lb	100 lb
Set 3	95%	1+AMRAP	195 lb	270 lb	345 lb	115 lb

Week 4 — Deload

Set	% TM	Reps	Bench Press	Back Squat	Deadlift	Overhead Press
Set 1	40%	5	80 lb	115 lb	145 lb	50 lb
Set 2	50%	5	105 lb	145 lb	185 lb	60 lb
Set 3	60%	5	125 lb	170 lb	220 lb	70 lb

AMRAP set rules

The final set of weeks 1, 2, and 3 is “reps+” — perform as many reps as you can with good form. The minimum reps target (5, 3, 1) must be hit; aim for 1-3 extra reps on top. If you crush the AMRAP set by 5+ reps consistently, your TM is too low — increase by 5 lb (upper body) / 10 lb (lower body) next cycle.

How 5/3/1 works

5/3/1 is built on five principles that distinguish it from other strength programs:

Train each main lift once per week. Bench, squat, deadlift, overhead press — one heavy day each, four total weekly sessions in the basic template.
Base everything on a Training Max. TM = 90% of true 1RM. All working set percentages reference the TM, not your tested max. This buffer absorbs daily strength variability.
Run 4-week waves. Three weeks of progressive loading (5s, 3s, 5/3/1) followed by a deload week (Week 4) of 40-60% TM. The deload is mandatory — skipping it leads to stalled progression.
AMRAP the final working set. The third set of weeks 1-3 is a rep-out: do as many quality reps as you can. Use the rep counts to track real progress (more reliable than 1RM tests).
Add weight slowly. Each cycle, add 5 lb to upper-body lifts and 10 lb to lower-body lifts on the TM. Reset by 10% if you stall on the AMRAP for 2+ cycles.

Common 5/3/1 variations

Boring But Big (BBB)

After the main 5/3/1 working sets, perform 5 sets of 10 reps at 50-60% TM with the same lift (or its complement: bench day adds OHP volume, squat day adds deadlift, etc.). High-volume hypertrophy added on top of the strength base.

First Set Last (FSL)

After main work, perform 3-5 sets of 5 reps at the first working set weight (65-75% TM). Lower volume than BBB but higher intensity — better carryover to the main lift on the next wave.

Triumvirate

Pair main work with two accessory exercises, 5×10 each. Wendler's default suggested template in the original book. Bench day = dumbbell bench + dumbbell row; squat day = leg press + leg curl; etc.

5/3/1 BBS / Building the Monolith

Wendler's “Beyond 5/3/1” and “Building the Monolith” templates add increased frequency, jokers, and FSL with PR sets. For intermediate-to-advanced lifters who've run base 5/3/1 for a year+.

Jim Wendler and the origin of 5/3/1

Jim Wendler trained for years at Westside Barbell under Louie Simmons, building an elite raw + equipped powerlifting career that included a 1,000 lb squat, 675 lb bench, and 700 lb deadlift. By his late 20s he was burned out — chronic injuries, plateauing strength, and a full-time job that didn't leave room for the four-day Westside conjugate template.

His response was 5/3/1: a deliberately under-stimulating program designed around the principle that slow progress beats stalled progress. The core insight was the Training Max — work at 90% of true 1RM rather than your actual max — which absorbs daily strength variability and lets you reliably hit prescribed reps even on bad training days. Wendler self-published the first edition in 2009. The book became the bestselling intermediate strength program manual of the 2010s.

The program's philosophy: do main work, do conditioning, do mobility, eat, sleep, repeat. No fancy periodization, no exotic intensification techniques — just steady incremental load increase across 4-week waves with mandatory deloads. Wendler has subsequently published Beyond 5/3/1, Forever, and dozens of templates building on the original.

All major 5/3/1 variations

Boring But Big (BBB)

After main 5/3/1 working sets, perform 5×10 of the same lift at 50-60% TM. High-volume hypertrophy stack. Most popular accessory variant. Long-term sustainable. The first “cycle of choice” for most 5/3/1 trainees.

First Set Last (FSL)

After main work, perform 3-5 sets of 5 reps at the first working set weight (65-75% TM). Lower volume than BBB but more strength-focused. Better carryover to the main lift than BBB.

Joker Sets

After hitting the prescribed 5/3/1 top set, work up to a heavier single or double for the day. Used when feeling strong. Adds intensification without destabilizing the program.

PR Sets (Push the AMRAP)

Treat every Week 3 final set as a true AMRAP — push to absolute rep maximum with good form. Wendler's preferred progress metric: track AMRAP rep counts cycle-over-cycle to gauge real strength gain.

Building the Monolith

Six-week brutal-volume specialization template from Beyond 5/3/1. High-frequency squats, heavy loaded carries, conditioning. Designed to add 20-40 lb of bodyweight and large strength jumps. Not sustainable long-term; use as a 1-2 cycle block.

5/3/1 Forever

Wendler's 2017 book of 30+ template variations including 5's Pro (no AMRAP), 5×5/3/1 (more volume), Anchor + Leader cycles (block periodization within 5/3/1), Pyramid (work back down after the top set).

5's Pro

Replace the AMRAP set with a fixed set of 5. Less reps, lower fatigue cost per session. Use during accumulation blocks where you want predictable volume rather than maximum effort.

BBB Beefcake

Highest-volume 5/3/1 variant: BBB at 60% TM with bodyweight calisthenics added between main lift sets. Aimed at gaining size while building strength.

Sample 5/3/1 + BBB training week

For a lifter with bench TM = 200 lb, squat TM = 350 lb, deadlift TM = 400 lb, OHP TM = 130 lb, here's how Week 1 (the “5s week”) plays out:

Sample 5/3/1 Week 1 training template with BBB assistance.
Day	Main lift	Working sets	BBB assistance
Mon	Bench (TM 200)	130×5, 150×5, 170×5+	Bench 5×10 @ 100 lb (50%)
Tue	Squat (TM 350)	230×5, 265×5, 300×5+	Squat 5×10 @ 175 lb (50%)
Thu	OHP (TM 130)	85×5, 100×5, 110×5+	OHP 5×10 @ 65 lb (50%)
Fri	Deadlift (TM 400)	260×5, 300×5, 340×5+	Deadlift 5×10 @ 200 lb (50%)

Common 5/3/1 mistakes

Setting TM too high. If you can't hit the prescribed AMRAP rep target with quality, drop TM by 10%.
Skipping the deload. Week 4 is mandatory. Lifters who skip it stall within 2-3 cycles.
Not pushing AMRAP sets. The PR sets are the program's engine. Treat every Week 3 final set as a real test.
Using 5/3/1 as a novice. If you can still add weight every workout (linear progression), 5/3/1 will be too slow. Run Starting Strength or StrongLifts 5×5 first.
Adding too much accessory. The program already has assistance prescriptions; piling on more usually compromises recovery from the main work.
Mixing 5/3/1 with conjugate. The two programs have different recovery and frequency assumptions; running them in parallel rarely works.