5/3/1 Calculator

This 5/3/1 calculator lays out a full cycle of Jim Wendler's 5/3/1 strength programme from a single number: your one rep max. Enter your 1RM for the squat, bench press, deadlift or overhead press, choose the training max percentage (90% is the standard), and pick the increment your plates allow, and the calculator produces your training max plus every working set for the four-week cycle. Week 1 is three sets of 5, week 2 is three sets of 3, week 3 is the 5/3/1 week that gives the programme its name, and week 4 is a light deload. The final set of the first three weeks is the plus set, where you perform as many quality reps as you can with that weight. Because barbells load in fixed steps, every prescribed weight is rounded to your chosen increment, 2.5 kg by default, so the numbers on screen match the plates on the bar. Run the calculator once per lift, note the twelve working weights, and after each cycle add 2.5 kg to your upper body training maxes and 5 kg to your lower body ones. If you do not know your 1RM, estimate it first with our one rep max calculator.

Calculate.co.nz is proud to be partnered with Premium Homes, a recognised leader in eco-friendly, sustainable, and energy-efficient homebuilding. With a dedicated team and award-winning experience, they create homes that prioritise health, comfort, and long-term performance. Their founders, Andrew and Kelly, set out to raise the standard of residential construction in New Zealand by combining practical building expertise with a clear commitment to doing things better for homeowners.
Calculate.co.nz partner: Premium Homes
kg
% of 1RM
90 kg
your training max (all sets are percentages of this)
Week 1 top set x 5+77.5 kg
Week 2 top set x 3+80 kg
Week 3 top set x 1+85 kg
WeekSet 1Set 2Set 3
Week 1 (5s)65% 57.5 kg x 575% 67.5 kg x 585% 77.5 kg x 5+
Week 2 (3s)70% 62.5 kg x 380% 72.5 kg x 390% 80 kg x 3+
Week 3 (5/3/1)75% 67.5 kg x 585% 77.5 kg x 395% 85 kg x 1+
Week 4 (deload)40% 35 kg x 550% 45 kg x 560% 55 kg x 5

Percentages are of the training max, not the true 1RM. Weights are rounded to the nearest increment you selected, so small differences from the raw percentage are normal. Warm-up sets are not shown. Train within your ability and use spotters or safeties on heavy sets.

How it works

The training max is your one rep max multiplied by the training max percentage, 90% by default. Every working set is then a fixed percentage of the training max: 65, 75 and 85% in week 1, 70, 80 and 90% in week 2, 75, 85 and 95% in week 3, and 40, 50 and 60% in the deload week. Each raw weight is rounded to the nearest plate increment you chose, using standard rounding, so 76.5 kg becomes 77.5 kg with 2.5 kg steps while 63 kg drops to 62.5 kg. The last set in weeks 1 to 3 is performed for as many good reps as possible, which is where the programme measures progress from cycle to cycle.

Worked example

With a 100 kg squat 1RM and the standard 90% setting, your training max is 90 kg. Week 1 calls for 65%, 75% and 85% of 90 kg, which is 58.5, 67.5 and 76.5 kg, and with 2.5 kg rounding you load 57.5 kg x 5, 67.5 kg x 5 and 77.5 kg x 5+. Week 2 gives 63, 72 and 81 kg, loaded as 62.5 kg x 3, 72.5 kg x 3 and 80 kg x 3+. Week 3 gives 67.5, 76.5 and 85.5 kg, loaded as 67.5 kg x 5, 77.5 kg x 3 and 85 kg x 1+. The deload week is 35, 45 and 55 kg for comfortable sets of 5.

Related calculators

If you've found a bug, or would like to contact us, or learn more about James Graham and Calculate.co.nz.

Calculate.co.nz is partnered with Interest.co.nz for New Zealand's highest quality calculators and financial analysis.

Calculate.co.nz is the sister site of CalculatorHub.com, the world's largest calculator website by tool count.

All calculators and tools are provided for educational and indicative purposes only and do not constitute financial advice.

Calculate.co.nz is proudly part of the Realtor.co.nz group, New Zealand's leading property transaction literacy platform, helping Kiwis understand the home buying and selling process from start to finish. Whether you're a first home buyer navigating your first property purchase, an investor evaluating your next acquisition, or a homeowner planning to sell, Realtor.co.nz provides clear, independent, and trustworthy guidance on every step of the New Zealand property transaction journey.

Calculate.co.nz is also partnered with Health Based Building and Premium Homes to promote informed choices that lead to better long-term outcomes for Kiwi households.

Calculate.co.nz is hosted in Auckland by SiteHost New Zealand.

All content on this website, including calculators, tools, source code, and design, is protected under the Copyright Act 1994 (New Zealand). No part of this site may be reproduced, copied, distributed, stored, or used in any form without prior written permission from the owner.

About & trust: Why Calculate is NZ's most comprehensive · By the Numbers · How we compare · Editorial standards · How we keep data current · NZ finance glossary · Research & data · Financial literacy NZ · About · Privacy policy · Terms of use

Reviewed and maintained. Last reviewed 2026-07-31 and checked on a twice-monthly cycle against IRD, RBNZ and Stats NZ. How we keep data current.

© 2026 Calculate.co.nz. All rights reserved. Building free NZ calculators since 2011.