Jacked is built for lifters who train for hypertrophy and want fast workout logging, clear progression targets, rest timing, and useful progress history on iPhone.

Can Jacked import my Hevy history?

Jacked includes Hevy import flows for workouts, routines, measurements, exercise notes, and training history context.

Does Jacked support RIR training?

Yes. Jacked supports RIR-aware set logging and progression guidance, with simpler logging modes for lifters who do not want to enter RIR every set.

1RM Calculator

Estimate your max, then get a useful training target. Most 1RM calculators stop at the max estimate. Jacked also gives a practical next target for training.

Log the set in Jacked and the next target stays with the workout.

How to read the result

Estimate your max, then get a useful training target. The notes below show the assumptions behind that recommendation.

What is e1RM?

Estimated one-rep max is a ballpark strength estimate from a submaximal set. It is useful for trends and targets, not a perfect prediction.

1RM vs PR

A 1RM is a max estimate or test. A PR is what you have actually achieved. Jacked treats estimates as training context.

Why RIR improves the estimate

A set of five with three reps left is not the same as a set of five at failure. RIR lets the formula account for effort.

Best rep ranges for estimating 1RM

Sets around 3-10 reps with clear effort usually produce better estimates than very high-rep sets.

How to use e1RM for hypertrophy

Use e1RM to pick sensible rep-range loads, then let performance and RIR decide the next jump.

Short answers

Which 1RM formula should I use?

The Jacked average uses Epley and Brzycki when valid. You can also view Epley, Brzycki, or Lander directly.

Can I use this for bench, squat, and deadlift?

Yes. Exercise-specific pages can add better examples, but the calculator works for any lift.

Jacked turns your training history into next-set targets, RIR tracking, rest timing, smart warm-ups, PRs, and progress feedback.

Method, assumptions, and privacy

Method

Combines common e1RM formulas where valid, then adds rep maxes, percentages, and a useful target instead of stopping at a max estimate.

Assumptions

High-rep and sloppy sets are lower-confidence. Treat e1RM as a trend and targeting tool, not a guaranteed max.

Privacy

Inputs are handled in the browser for the web tool experience. Jacked should only store lifting data when a user chooses to log it in the app.

Check the method before you trust the number. Bad inputs still produce tidy-looking outputs.

This is one set.

Jacked does it for your whole workout: next-set targets, RIR, rest timing, warm-ups, PRs, and progress feedback.

Download Jacked for iPhone