Tire Load Index Calculator
Convert Load Index to maximum safe load capacity per tire (lbs & kg) and match it to your vehicle’s weight.
QUICK EXAMPLE
A tire with Load Index 94 can safely support up to about 1,477 lbs (670 kg) per tire at its maximum rated pressure. With four identical tires, that equates to a combined tire load capacity of roughly 5,908 lbs. If your fully loaded vehicle (curb weight + passengers + cargo) weighs around 4,800 lbs, this provides a healthy margin — as long as each axle’s load stays within its rating and you maintain proper inflation.
Load Index
91
Max Load Per Tire
1,356
lbs
Max Load Per Tire
615
kg
Total Capacity (4 tires)
5,424 lbs / 2,460 kg
This is the maximum load per tire. Never use a tire with a lower load index than specified by your vehicle manufacturer.
Common Load Index Reference
| Index | lbs | kg | Category |
|---|---|---|---|
| 75 | 853 | 387 | Compact |
| 80 | 992 | 450 | Compact |
| 84 | 1,102 | 500 | Compact |
| 87 | 1,201 | 545 | Passenger / SUV |
| 91 | 1,356 | 615 | Passenger / SUV |
| 94 | 1,477 | 670 | Passenger / SUV |
| 97 | 1,609 | 730 | Passenger / SUV |
| 100 | 1,764 | 800 | Passenger / SUV |
| 103 | 1,929 | 875 | LT / SUV |
| 107 | 2,149 | 975 | LT / SUV |
| 111 | 2,403 | 1,090 | LT / SUV |
| 114 | 2,601 | 1,180 | Heavy Truck |
| 117 | 2,833 | 1,285 | Heavy Truck |
| 121 | 3,197 | 1,450 | Heavy Truck |
Showing representative values. Enter any index 70–121 above for full details.
AI Insight
Powered by AIGet a plain-English explanation of your results — what they mean for your vehicle and driving experience.
Common Load Index Reference Table
| Load Index | Max Load (lbs)* | Max Load (kg)* | Typical Use |
|---|---|---|---|
| 88 | 1,235 | 560 | Small cars, compact crossovers |
| 91 | 1,356 | 615 | Midsize sedans, smaller SUVs |
| 94 | 1,477 | 670 | Performance sedans, larger crossovers |
| 96 | 1,565 | 710 | Larger sedans, crossovers, light SUVs |
| 100 | 1,764 | 800 | Light trucks, heavier SUVs, vans |
| 104 | 1,984 | 900 | Heavy-duty pickups, towing & cargo vans |
*Values are based on standardized Load Index charts and represent the maximum load a single tire can carry at its rated maximum pressure and speed. For safety, always verify exact capacities in the tire manufacturer’s data and ensure your chosen tires meet or exceed the Load Index specified on your vehicle’s door placard.
How to Use This Calculator
- Find the Load Index number in your tire’s service description (for example, 225/65R17 102H → load index 102).
- Enter that Load Index number into the calculator and click "Calculate Load Capacity".
- Review the maximum load per tire in both pounds and kilograms. This value assumes the tire is inflated to its maximum rated pressure.
- Multiply the per‑tire load by the number of tires on an axle or on the vehicle, then compare to your vehicle’s GAWR (per axle) and GVWR (total) from the door placard or owner’s manual. Never choose a tire with a lower Load Index than specified by the vehicle manufacturer.
Load Index Explained
About Tire Load Index & Vehicle Weight
What Load Index Tells You (and What It Does Not)
Load Index tells you the maximum weight a single tire can support at its rated pressure and speed, but it does not tell you what pressure to run day‑to‑day or how much weight your vehicle should actually carry. Those decisions are driven by your vehicle’s Gross Vehicle Weight Rating (GVWR) and axle ratings (GAWR), which are set by the manufacturer. Load Index is the tire‑side limit that must never be exceeded at the pressure you are running.
Matching Tires to GVWR and GAWR
To be safe, the combined capacity of the tires on each axle (per‑tire load index × number of tires) must be equal to or greater than that axle’s GAWR, and the total capacity of all tires should exceed the vehicle’s GVWR. When choosing replacement tires, always start with the Load Index specified on the door placard and go higher if you expect heavy loads, towing, or commercial use — but never lower.
Load Index, Inflation Pressure & Real‑World Use
The load a tire can safely carry at a given pressure is governed by load and inflation tables published by tire and wheel industry associations. The Load Index on the sidewall reflects the maximum capacity at the tire’s maximum pressure, not necessarily the everyday pressure listed on your vehicle placard. That is why proper inflation is just as critical as choosing the correct Load Index: under‑inflated tires may be overloaded even if the Load Index looks sufficient on paper.