iPhone Screenshots


Reps Calculator is a tool to help you determine your 1-rep max! Because of the nature and stress of attempting a 1-rep max, this utility allows you to enter in a weight you successfully lifted at the number of reps you performed in order to see what your estimated 1-rep max is.

This not only helps give you an idea of the weight to attempt when actually performing a 1-rep max but also to gauge your strength and compare different rep schemes performed at different reps. If one week you were able to bench press 190 lbs at 6 reps and the next week you did 200 for 5, this app gives you a way to compare the two as best as possible (190 lbs @ 6 reps gives a 1-rep max estimate of 223 lbs vs. 200 lbs @ 5 reps gives a 1-rep max estimate of 227 lbs)

Upgrade to the Pro version to get all the settings and features!
+More formulas in order to best estimate your maximums
+Multiple rep maxes (up to 10)
+Ability to switch between lbs and kgs
+Percentage view that shows anywhere from 50% to 95% of your 1-rep max
+Different color themes

Reps Calculator is only intended to give estimates based on the data you enter. Since these are calculated values they may vary with actual measured values. Always ensure you have a spotter, and work your way up to your limit with more than adequate warmup to prevent injuries.

What’s New

Version 3.0.0

Introducing a brand new 3.0 version of Reps Calculator!
- Completely revamped UI
- New theme colors for pro users
- (Finally) Optimized for larger iPhone screens
- Ability to Share your lifts with your friends

And as always if you like Reps Calculator, please rate it on the app store or send feedback with your thoughts!

Ratings and Reviews

4.5 out of 5
10 Ratings
10 Ratings
Relmerator ,

Simple and clean design

Easy and fast to use. I’d happily pay for the upgrade to pro, but the app seems to have been abandoned. My only complaint is that it doesn’t use the full screen size in the iPhone X.

DJ Prophet ,


Helps you figure percentages and make you want to surpass those rep ranges. Simple and basic all you need.

Joehose84 ,


This app gives you your 1rep max with out risk of injury plus it's simple


David Bai
13.4 MB
Health & Fitness
Requires iOS 8.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© David Bai
In-App Purchases
  1. Pro Upgrade $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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