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RackMath Barbell Calculator

RackMath Barbell Calculator

Plate math made easy

538 ratings
71 reviews
💪 Health & Fitness

Archived App (Last seen on 23 Apr 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • March 29, 2016
  • November 25, 2019

Developer

Classy Jackal Inc
✨Promote your app ✨
RackMath Barbell Calculator screenshot #1 for iPhone
RackMath Barbell Calculator screenshot #2 for iPhone
RackMath Barbell Calculator screenshot #3 for iPhone
RackMath Barbell Calculator screenshot #4 for iPhone
RackMath Barbell Calculator screenshot #5 for iPhone
RackMath Barbell Calculator screenshot #6 for iPhone
iphone
ipad
🧾$2.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐71
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

This app simplifies weight plate calculations for gym-goers. It instantly determines the correct plates needed for any barbell weight, allowing users to focus on their workouts. Users can customize their available plates and choose between pounds or kilograms.

✓Instant plate calculations
✓Customizable equipment inventory
✓Supports pounds and kilograms
✓Fractional and non-standard plates
✓Ad-free experience (premium)
✓Percent-based weight calculations (premium)
Show original description

What users say

Summarized from real user reviews of RackMath Barbell Calculator. Based on 538 reviews and a 4.8/5 average, it highlights the 5 positives and 4 negatives reviewers mention most about this Health & Fitness app.

Positive things

  • 👍Easy to use
  • 🚀Simplifies gym math
  • 💡Customizable plate inventory
  • 🚀Speeds up workouts
  • 👍Comprehensive weightlifting tool

Negative things

  • 🐛Inconsistent math calculations
  • 💰Paywall for basic features
  • 🔒Inability to customize bar weight
  • 🔒Frequent review requests
See all reviews

What's New in RackMath Barbell Calculator

1.6

November 25, 2019

Minor bug fixes.

1

In-App Purchases

$2.99

Premium Upgrade

This non-consumable premium upgrade will unlock the full power of RackMath. Purchasing it will enable full customization of the bar inventory, saved exercises, a rep range calculator, and no ads.

More

User reviews

Most RecentHighest RatedLowest Rated

I love the app

I been using this app for a while now and I am loving it no more guessing the weight.
Luis202Luis202

It’s tuff

It’s so Tuff
Gabe CandiesGabe Candies

Pretty Good With One Flaw

I’ve been using this calculator for a while and while it does the job, the inability to change the color or the plates bugs me. For the plates that are colored yellow, it’s hard to see the number on the plate. They should change the font color on the plate markings to black instead of white so that the numbers are visible. White on yellow just isn’t very visible.
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GresheGreshe

Excellent

Does what is advertised. It’s great for thinking less at the gym, especially if you listen to podcasts or audiobooks like I do and my brain is already occupied thinking about important things — not how much weight I need to put on the bar.
Josh MoxeyJosh Moxey

Not helpful if you are looking for free option.

Just use chatGPT instead.

I wanted something that would help me keep up with what weight is on the bar.
Everything you tap on is “upgrade to premium”.
🧄🌶🫑🥑🧄🌶🫑🥑
See 66 more reviews

Developer apps

TimeSpotter Interval Timer
TimeSpotter Interval Timer

Interval Countdown & Stopwatch

💪 Health & Fitness

(5)

Free
In-App Purchases
Grease The Groove
Grease The Groove

Rep Counter

💪 Health & Fitness

(8)

Free
See developer apps

User experience

🐞

Reported Bugs

3 issues

Upgrade purchase issues

Bug

Inability to calculate certain weight combinations

Bug

Rounding down instead of providing alternative solutions

Bug
✨

Requested Features

4 requests

Dark mode option

Feature

Blended inventory for metric and imperial plates

Feature

Prep warning before work sets

Feature

Ability to apply inventory to reverse calculator

Feature

FAQ

What does the RackMath Barbell Calculator do?

This app helps you quickly calculate which weight plates to load onto your barbell for any desired weight. It eliminates the need for manual calculations, allowing you to focus on your workout. You can select your available plates and choose between pounds or kilograms.

What are the key features of RackMath?

Key features include instant plate calculations, a customizable equipment inventory to match your gym's plates, support for fractional and non-standard plates, and the ability to select between pounds or kilograms. Premium features offer more bars, increased plate capacity, and advanced calculation tools.

How much does RackMath cost?

The app is free to download and use with basic features. Advanced features, such as more bar options, increased plate capacity, and specialized calculators, are available through a one-time in-app purchase.

What kind of plates can I use with RackMath?

You can customize your equipment inventory to include the specific weight plates available at your gym. This includes standard plates, fractional plates, and many other denominations. Premium users can increase the number of plates they can load from 8 to 16.

Who would benefit from using this app?

This app is ideal for anyone who lifts weights at the gym, from beginners to experienced powerlifters. It's particularly useful for those who frequently perform heavy compound lifts like squats, deadlifts, and bench presses, or anyone who wants to ensure accurate weight loading for safety and efficiency.