Tire Load Index Decoder
Turn a load index into kg and lb per tire. Use the calculator below. Results update as you type.
How the Tire Load Index Decoder Works
This decoder works by looking up the load index number in the standard load table and returning the maximum load per tire in kilograms and pounds. The load index is the number in the service description, such as 94 in 94W.
- Enter the load index, for example 94.
- Read the capacity: 670 kg (1,477 lb) per tire.
- Multiply by 4 for the full set: 2,680 kg (5,908 lb).
- Compare with the vehicle's gross axle weight rating on the door placard.
The Formula
The formula is a table lookup: Load (kg) = Table[Load Index], with Load (lb) = Load (kg) × 2.20462.
Load (kg) = LI_Table[Index] Load (lb) = Load (kg) × 2.20462 Axle Capacity = 2 × Load per TireThe table steps unevenly: about 12–20 kg per index below 90 and 25–50 kg per index above 100. Worked example: index 110 equals 1,060 kg (2,337 lb), so 2 tires carry 2,120 kg (4,674 lb) per axle.
Conversion Table
The conversion table lists load indexes 75 to 124 with the capacity per tire in kg and lb. The table splits into 2 column groups of 25 rows.
Passenger cars use indexes 75–105. SUVs and light trucks use 100–124. The capacity is the maximum at the tire's reference pressure.
| Index | kg | lb | Index | kg | lb |
|---|---|---|---|---|---|
| 75 | 387 | 853 | 100 | 800 | 1,764 |
| 76 | 400 | 882 | 101 | 825 | 1,819 |
| 77 | 412 | 908 | 102 | 850 | 1,874 |
| 78 | 425 | 937 | 103 | 875 | 1,929 |
| 79 | 437 | 963 | 104 | 900 | 1,984 |
| 80 | 450 | 992 | 105 | 925 | 2,039 |
| 81 | 462 | 1,019 | 106 | 950 | 2,094 |
| 82 | 475 | 1,047 | 107 | 975 | 2,150 |
| 83 | 487 | 1,074 | 108 | 1,000 | 2,205 |
| 84 | 500 | 1,102 | 109 | 1,030 | 2,271 |
| 85 | 515 | 1,135 | 110 | 1,060 | 2,337 |
| 86 | 530 | 1,168 | 111 | 1,090 | 2,403 |
| 87 | 545 | 1,202 | 112 | 1,120 | 2,469 |
| 88 | 560 | 1,235 | 113 | 1,150 | 2,535 |
| 89 | 580 | 1,279 | 114 | 1,180 | 2,601 |
| 90 | 600 | 1,323 | 115 | 1,215 | 2,679 |
| 91 | 615 | 1,356 | 116 | 1,250 | 2,756 |
| 92 | 630 | 1,389 | 117 | 1,285 | 2,833 |
| 93 | 650 | 1,433 | 118 | 1,320 | 2,910 |
| 94 | 670 | 1,477 | 119 | 1,360 | 2,998 |
| 95 | 690 | 1,521 | 120 | 1,400 | 3,086 |
| 96 | 710 | 1,565 | 121 | 1,450 | 3,197 |
| 97 | 730 | 1,609 | 122 | 1,500 | 3,307 |
| 98 | 750 | 1,653 | 123 | 1,550 | 3,417 |
| 99 | 775 | 1,709 | 124 | 1,600 | 3,527 |
What Is the Tire Load Index Decoder?
The Tire Load Index Decoder is a tool that converts a tire's load index number into the maximum weight it carries. The load index is a code from 0 to 279 defined by ETRTO and ISO standards.
The vehicle maker sets a minimum load index for each vehicle. A replacement tire must carry an index equal to or higher than the placard value. A lower index can fail under full load or in heat.
Common Uses
This decoder has 4 uses: replacement checks, towing checks, axle math and XL decisions.
- Check replacements: Confirm the new tire meets the placard index.
- Check towing: Compare tongue weight with rear tire capacity.
- Do axle math: Double the per-tire load for axle capacity.
- Decide on XL: See how much an Extra Load tire adds.