Free Tool
Plate Calculator — Barbell Loading Visualizer
Enter any target weight in kilograms or pounds. See exactly which plates to load per side. Works for standard 20 kg / 45 lb bars, women's 15 kg / 35 lb bars, and custom bar weights. No signup. No ads.
How to use the plate calculator
- Type your target weight — the total weight you want on the bar, including the bar itself.
- Choose kg or lb based on the plates available at your gym.
- Select your bar — men's 20 kg / 45 lb is standard; women's 15 kg / 35 lb is common for women's powerlifting and Olympic lifting.
- The calculator shows you the plates per side using the largest plates possible. Load heaviest plates closest to the collar.
- Always use collars on the outside of the plates.
Standard Plate Weights Reference
| Color (IPF-style) | Kilograms | Pounds (approx) |
|---|---|---|
| Red | 25 kg | 55 lb |
| Blue | 20 kg | 44 lb |
| Yellow | 15 kg | 33 lb |
| Green | 10 kg | 22 lb |
| White | 5 kg | 11 lb |
| Small | 2.5 kg | 5.5 lb |
| Micro | 1.25 kg | 2.75 lb |
Many gyms also stock US pound-labeled plates at 45, 35, 25, 10, 5, and 2.5 lb. The calculator uses whichever plate set matches your selected unit.
Frequently Asked Questions
What is a plate calculator?
A plate calculator tells you exactly which plates to load on each side of a barbell for a given target weight. Enter total weight (including the bar), and the tool shows the optimal plate combination per side.
How much does a standard barbell weigh?
A men's Olympic bar is 20 kg (44 lb), typically rounded to 45 lb in US gyms. Women's Olympic bar is 15 kg (33 lb), rounded to 35 lb. Always confirm your bar's actual weight.
Which plates should I use?
Load the largest plates closest to the collar first, working outward with lighter plates. Minimize plate count — fewer plates = faster changes + more stable bar.
Do I include the bar weight in the target?
Yes. Target weight = total lifted weight = bar + plates on both sides.
Can I calculate plate loading offline?
IronStreak's iOS app includes a plate calculator that works fully offline, alongside the full workout tracker.
Related tools & reading
- 1RM Calculator — estimate your one rep max from any set
- Progressive overload guide — the only training principle that matters
- Bench press form — 7 cues every lifter needs
- Squat form — complete guide
- Deadlift form — conventional vs sumo
Track Every Set with IronStreak
Free on iOS. Includes a built-in plate calculator, 91 exercises, estimated 1RM charts, PR board, and Duolingo-style streak system.