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Tire Load Index Calculator

Decode a tire rating like 104H into load per tire in kg and lb plus the speed symbol, or find the load index your weight needs.

By TireCalculatorHub Editorial TeamUpdated: October 6, 2026

Quick Answer

  • 104H means load index 104, which carries 900 kg (1,985 lb) per tire, and speed symbol H, rated to 130 mph (210 km/h).
  • Four 104 tires carry 3,600 kg (7,940 lb) together. A load of 670 kg per tire needs at least load index 94 (1,475 lb).
  • Use at least the load index on your vehicle's tire placard or in the owner's manual. A higher index is allowed, but it does not raise the vehicle's maximum load.
Tire Load Index and Speed Rating Decoder

Enter the rating from the sidewall, such as 104H, 102/100R or 225/65R17 102H.

Load Index

104H

Index 104

Max Load Per Tire

900

kg (1,985 lb)

Four Tires Together

3,600

kg (7,940 lb)

Speed Symbol

H

130 mph (210 km/h)

This is the maximum load per tire when properly inflated (pounds from Bridgestone's International Load Index table for indexes 90 and up). Use a tire with at least the load index your vehicle's placard and owner's manual specify.

AI Insight
Powered by AI

Get a plain-English explanation of your results and what they mean for your vehicle.

Tire Load Index Chart: 70 to 170 in kg and lb

Maximum load per tire for each load index, from Bridgestone's International Load Index table (Truck Tire Data Book 2023). Pounds below index 90 are converted from kilograms.

Indexkglb
70335739
71345761
72355783
73365805
74375827
75387853
76400882
77412908
78425937
79437963
80450992
814621,019
824751,047
834871,074
845001,102
855151,135
865301,168
875451,201
885601,235
895801,279
906001,325
916151,355
926301,390
936501,435
946701,475
956901,520
967101,565
977301,610
987501,655
997751,710
1008001,765
1018251,820
1028501,875
1038751,930
Indexkglb
1049001,985
1059252,040
1069502,095
1079752,150
1081,0002,205
1091,0302,270
1101,0602,335
1111,0902,405
1121,1202,470
1131,1502,535
1141,1802,600
1151,2152,680
1161,2502,755
1171,2852,835
1181,3202,910
1191,3603,000
1201,4003,085
1211,4503,195
1221,5003,305
1231,5503,415
1241,6003,525
1251,6503,640
1261,7003,750
1271,7503,860
1281,8003,970
1291,8504,080
1301,9004,190
1311,9504,300
1322,0004,410
1332,0604,540
1342,1204,675
1352,1804,805
1362,2404,940
1372,3005,070
Indexkglb
1382,3605,205
1392,4305,355
1402,5005,510
1412,5755,675
1422,6505,840
1432,7256,005
1442,8006,175
1452,9006,395
1463,0006,610
1473,0756,780
1483,1506,940
1493,2507,160
1503,3507,390
1513,4507,610
1523,5507,830
1533,6508,050
1543,7508,270
1553,8758,540
1564,0008,820
1574,1259,090
1584,2509,370
1594,3759,650
1604,5009,920
1614,62510,200
1624,75010,500
1634,87510,700
1645,00011,000
1655,15011,400
1665,30011,700
1675,45012,000
1685,60012,300
1695,80012,800
1706,00013,200

The load is the maximum for a single tire when properly inflated. Use at least the load index on your vehicle's tire placard. For light truck and commercial tires the load range to ply rating chart shows the load at a given pressure.

What 104H, 91V and 102/100R Mean on a Tire

The service description after the tire size is the load index followed by the speed symbol, for example 205/55R17 91V. Two load indexes such as 121/118 give the single and dual values. Michelin says XL (Extra Load) tires carry more weight at higher inflation pressure than standard load tires of the same size.

RatingLoad indexLoad per tireSpeed symbolRated speed
75T75387 kg (853 lb)T118 mph (190 km/h)
87Y87545 kg (1,201 lb)Y186 mph (300 km/h)
91V91615 kg (1,355 lb)V149 mph (240 km/h)
94V94670 kg (1,475 lb)V149 mph (240 km/h)
96H96710 kg (1,565 lb)H130 mph (210 km/h)
97V97730 kg (1,610 lb)V149 mph (240 km/h)
99T99775 kg (1,710 lb)T118 mph (190 km/h)
102S102850 kg (1,875 lb)S112 mph (180 km/h)
102W102850 kg (1,875 lb)W168 mph (270 km/h)
104H104900 kg (1,985 lb)H130 mph (210 km/h)
104W104900 kg (1,985 lb)W168 mph (270 km/h)
107T107975 kg (2,150 lb)T118 mph (190 km/h)
108V1081,000 kg (2,205 lb)V149 mph (240 km/h)
110H1101,060 kg (2,335 lb)H130 mph (210 km/h)
111W1111,090 kg (2,405 lb)W168 mph (270 km/h)
114V1141,180 kg (2,600 lb)V149 mph (240 km/h)
120/117S120 single, 117 dual1,400 kg (3,085 lb), dual 1,285 kg (2,835 lb)S112 mph (180 km/h)
121/118R121 single, 118 dual1,450 kg (3,195 lb), dual 1,320 kg (2,910 lb)R106 mph (170 km/h)

Load per tire is for a single tire when properly inflated. Read more about the letters on the speed rating lookup in mph and km/h.

Load Index Needed for Your Vehicle Weight

Divide the weight by the number of tires and take the smallest load index at or above the result. This is arithmetic only: your vehicle's tire placard and owner's manual give the load index your car needs.

By load per tire

Load per tire (kg)Load per tire (lb)Minimum load indexThat index carries
35077272355 kg
40088276400 kg
45099280450 kg
5001,10284500 kg
5601,23588560 kg
6001,32390600 kg
6701,47794670 kg
7001,54396710 kg
8001,764100800 kg
9001,984104900 kg
1,0002,2051081,000 kg
1,1002,4251121,120 kg
1,2502,7561161,250 kg
1,4003,0861201,400 kg
1,5003,3071221,500 kg

By total weight on four tires

Total weight (kg)Total weight (lb)Per tire (kg)Minimum load index
1,5003,30737574
1,8003,96845080
2,0004,40950084
2,5005,51262592
3,0006,61475098
3,5007,716875103
4,0008,8181,000108

Loads are not shared evenly between the front and rear axles, so use the axle ratings and the tire placard for the real requirement.

Speed Symbols: The Letter After the Load Index

Michelin says the speed rating is the maximum speed at which a tire can carry its maximum load under specified conditions, and that replacements should meet or exceed the speed rating the vehicle manufacturer specifies. F to T are from Continental's data guide, with Bridgestone and Michelin for the rest.

Speed symbolmphkm/h
F5080
G5690
J62100
K68110
L75120
M81130
N87140
P93150
Q99160
R106170
S112180
T118190
U124200
H130210
V149240
W168270
Y186300

How to Use This Calculator

  1. Find the service description on the tire sidewall after the size, for example 225/65R17 102H. The number is the load index and the letter is the speed symbol. Two numbers such as 121/118 give single and dual.
  2. In Decode a Tire Rating, type the rating (102H, 94V, 121/118R) to see the load per tire in kg and lb, the load of four tires, and the speed symbol in mph and km/h.
  3. To work out a minimum, open Find the Load Index You Need, enter the weight, the unit and how many tires share it, and read the smallest index at or above the load per tire.
  4. Compare the result with the load index on your vehicle placard and owner's manual and use a tire with at least that index.

Frequently Asked Questions