Plate Calculator
Tap plates. See total in lb and kg. Done.
Tap to add · both sides
How to use
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Pick your equipment
Olympic bar (45 lb / 20 kg) is selected by default. Switch to a women's bar, EZ-curl, trap bar, plate-loaded machine, or enter a custom equipment weight.
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Tap plates onto the bar
Each tap adds one plate to both sides. The total weight updates instantly in your primary unit, with the other unit shown below.
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Or enter a target weight
Switch to "Enter weight" mode and type your target. The calculator shows the optimal plate breakdown using the largest plates first.
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Switch units instantly
Tap LB / KG in the header to swap your primary unit. Both values stay visible at all times — perfect when training abroad.
Common Plate Loadings (Olympic Bar)
Standard barbell loadings most lifters memorize. Tap any row to load it in the calculator.
LB
| Total | Per side | Plates per side |
|---|---|---|
| 95 lb | 25 lb | 25 |
| 135 lb | 45 lb | 45 |
| 185 lb | 70 lb | 45 · 25 |
| 225 lb | 90 lb | 45 · 45 |
| 275 lb | 115 lb | 45 · 45 · 25 |
| 315 lb | 135 lb | 45 · 45 · 45 |
| 365 lb | 160 lb | 45 · 45 · 45 · 25 |
| 405 lb | 180 lb | 45 · 45 · 45 · 45 |
| 495 lb | 225 lb | 45 · 45 · 45 · 45 · 45 |
KG
| Total | Per side | Plates per side |
|---|---|---|
| 40 kg | 10 kg | 10 |
| 60 kg | 20 kg | 20 |
| 80 kg | 30 kg | 20 · 10 |
| 100 kg | 40 kg | 20 · 20 |
| 120 kg | 50 kg | 20 · 20 · 10 |
| 140 kg | 60 kg | 20 · 20 · 20 |
| 160 kg | 70 kg | 20 · 20 · 20 · 10 |
| 180 kg | 80 kg | 20 · 20 · 20 · 20 |
| 220 kg | 100 kg | 20 · 20 · 20 · 20 · 20 |
Frequently Asked Questions
How many plates is 225 lb?
On a standard 45 lb Olympic bar: two 45 lb plates per side. (45 + 45 + 45) × 2 + 45 bar = 225 lb.
How many plates is 315 lb?
On a standard 45 lb Olympic bar: three 45 lb plates per side. (45 × 3) × 2 + 45 = 315 lb. The classic "three plates a side".
How much does a 45 lb plate weigh in kg?
A 45 lb plate weighs approximately 20.41 kg. Most international gyms use 20 kg plates instead, which equal 44.09 lb.
What does an Olympic barbell weigh?
A standard men's Olympic barbell weighs 45 lb (20 kg). A women's Olympic bar weighs 33 lb (15 kg). EZ-curl bars are typically 15–25 lb (7–11 kg). Specialty bars vary.
Does this work for plate-loaded machines?
Yes. Switch the equipment selector to "Plate-Loaded Machine" — bar weight is set to zero, and you see the pure plate total. Most lifters track machine work this way since machine starting weight varies and is rarely labeled.
Does it work offline?
Yes. Once the page is loaded, the calculator runs entirely on your device with no network needed. Add it to your home screen for instant access during workouts.
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