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Body Mass Index Calculator

BMI Calculator


What is BMI?

BMI is the abbreviation of “Body Mass Index”. BMI is calculated by dividing a person’s body weight with a square of total height in meters.

Body mass index is used as a test to check on what category of weight a person falls.

There are adverse health effects of high BMI value. If your BMI value is more or less than normal you might face serious health consequences.

BMI is a useful rule that is used to categorize as if a person is underweight, normal weight, overweight and obese. BMI is calculated on the basis of tissue mass, muscle fat, bones, and height. Commonly the BMI range 18 to 30. The SI unit for body mass index that is used is Kg/m2 according to the formula.


How to calculate BMI?

There are two ways that you can use to measure your BMI.

  • Manually by using formulas and get the help of charts
  • Using our e-calculators BMI checker

Formulas and Calculations of BMI

The formula is the same for men, women, and children. The basic requirement is to know your body weight and height.

Body mass index formula

If weight is in pounds and height in inches then formula: weight (lb) / [height (in)]2 x 703

Multiply weight with 703 (conversion factor) and divide square of height to calculate BMI.

Example: Weight= 150 lbs, height= 65 inches

Then: [150 ÷ (65)2] x 703 = 24.96 BMI

If weight is in kg and height in meters then formula: weight (kg) / [height (m)]2

This is the standard formula used most of the time and all you need is to just divide the weight by square of height and get the BMI.

Example: Weight= 65 kg, Height= 1.65 meters

Then: 65 ÷ (1.65)2 = 23.87 BMI

You can use our BMI calculator kg for easy and precise calculations.


BMI ranges body mass index chart (BMI chart)

Here is a BMI table that you can use according to your height weight to know which category you fall.

Normal Overweight Obese Extreme Obesity
BMI 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
Height (inches) Body Weight (pounds)
58 91 96 100 105 110 115 119 124 129 134 138 143 148 153 158 162 167 172 177 181 186 191 196 201 205 210 215 220 224 229 234 239 244 248 253 258
59 94 99 104 109 114 119 124 128 133 138 143 148 153 158 163 168 173 178 183 188 193 198 203 208 212 217 222 227 232 237 242 247 252 257 262 267
60 97 102 107 112 118 123 128 133 138 143 148 153 158 163 168 174 179 184 189 194 199 204 209 215 220 225 230 235 240 245 250 255 261 266 271 276
61 100 106 111 116 122 127 132 137 143 148 153 158 164 169 174 180 185 190 195 201 206 211 217 222 227 232 238 243 248 254 259 264 269 275 280 285
62 104 109 115 120 126 131 136 142 147 153 158 164 169 175 180 186 191 196 202 207 213 218 224 229 235 240 246 251 256 262 267 273 278 284 289 295
63 107 113 118 124 130 135 141 146 152 158 163 169 175 180 186 191 197 203 208 214 220 225 231 237 242 248 254 259 265 270 278 282 287 293 299 304
64 110 116 122 128 134 140 145 151 157 163 169 174 180 186 192 197 204 209 215 221 227 232 238 244 250 256 262 267 273 279 285 291 296 302 308 314
65 114 120 126 132 138 144 150 156 162 168 174 180 186 192 198 204 210 216 222 228 234 240 246 252 258 264 270 276 282 288 294 300 306 312 318 324
66 118 124 130 136 142 148 155 161 167 173 179 186 192 198 204 210 216 223 229 235 241 247 253 260 266 272 278 284 291 297 303 309 315 322 328 334
67 121 127 134 140 146 153 159 166 172 178 185 191 198 204 211 217 223 230 236 242 249 255 261 268 274 280 287 293 299 306 312 319 325 331 338 344
68 125 131 138 144 151 158 164 171 177 184 190 197 203 210 216 223 230 236 243 249 256 262 269 276 282 289 295 302 308 315 322 328 335 341 348 354
69 128 135 142 149 155 162 169 176 182 189 196 203 209 216 223 230 236 243 250 257 263 270 277 284 291 297 304 311 318 324 331 338 345 351 358 365
70 132 139 146 153 160 167 174 181 188 195 202 209 216 222 229 236 243 250 257 264 271 278 285 292 299 306 313 320 327 334 341 348 355 362 369 376
71 136 143 150 157 165 172 179 186 193 200 208 215 222 229 236 243 250 257 265 272 279 286 293 301 308 315 322 329 338 343 351 358 365 372 379 386
72 140 147 154 162 169 177 184 191 199 206 213 221 228 235 242 250 258 265 272 279 287 294 302 309 316 324 331 338 346 353 361 368 375 383 390 397
73 144 151 159 166 174 182 189 197 204 212 219 227 235 242 250 257 265 272 280 288 295 302 310 318 325 333 340 348 355 363 371 378 386 393 401 408
74 148 155 163 171 179 186 194 202 210 218 225 233 241 249 256 264 272 280 287 295 303 311 319 326 334 342 350 358 365 373 381 389 396 404 412 420
75 152 160 168 176 184 192 200 208 216 224 232 240 248 256 264 272 279 287 295 303 311 319 327 335 343 351 359 367 375 383 391 399 407 415 423 431
76 156 164 172 180 189 197 205 213 221 230 238 246 254 263 271 279 287 295 304 312 320 328 336 344 353 361 369 377 385 394 402 410 418 426 435 443

Body mass index for women and men is more or like same and this chart can be used for every gender, age group according to the height and body mass.

Note: these are average values abundantly found in between people around the globe. BMI value may differ as per region.


Calculate using Body mass index calculator

Measuring BMI was never easy until our developer made this precise online tool for everyone. Our user-friendly calculator is widely used to calculate BMI for men, women, and kids.

If you want to compute BMI all you have to do is insert your particular gender, height and weight and hit the “calculate” button and get the BMI in seconds.

You can insert your height in meter, centimeter, feet, inches, feet/inches and for a weight you can use our ton, tonne, gram, kilograms, pounds, ounce as our BMI calculator metric system support all the units.

If you are looking for the best BMI calculator for men or BMI calculator for women then you are in the right place. As our tool provides a gender choosing option and allows both male and female users to use it.

Another method is to calculate your total body surface area and body mass more precisely and using it to determine the category you fall like underweight or normal. You can measure your body surface area as well by using our BSA calculator.


Interpretation of BMI

As BMI is co-related with height and weight. The gender aspect doesn’t bring any change to the BMI value. So the ideal BMI value for both men and women is the same.

Here are the BMI ranges and categories according to it:

  • Underweight: The BMI value of less than 18.0
  • Normal range: BMI value 18.5 to 23
  • Overweight (low risk): BMI value 23 to 25
  • Overweight (moderate obese): BMI value 25 to 30
  • Overweight (Severely obese): BMI value more than 30

Although these values change from regions to regions. According to your BMI, you can refer to a doctor if you are overweight or underweight. You can use your BMI value and refer to a doctor whether you need to lose weight or gain weight.

Both low and high BMI values can cause elevated level consequences just like Blood pressure diseases due to obesity. You can check our BP calculator for more information about your blood pressure and other problems.

Here are some diseases occurring in adults due to high or low BMI value:

  • Coronary artery disease
  • Dyslipidemia
  • Diabetes (Type 2)
  • Epidural lipomatosis
  • Stroke
  • infertility
  • Hypertension (severe headache)
  • Osteoarthritis
  • Sleep apnea
  • Gallbladder disease
  • 10 types of cancers  (endometrial, breast, and colon cancer)

Obesity is one major issue that causes all the adverse effects. If your BMI value is more than 25 or less than 18 then you should refer to a doctor as soon as possible.

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