Calculate inseam length from height, or height from inseam, in inches or cm using the common 45% inseam-to-height ratio or a ratio you choose.
| Height to Inseam | Inseam to Height |
|---|---|
| 5’0″ (60 in) = 27.00 in inseam | 27 in inseam = 60.00 in (≈ 5’0″) |
| 5’2″ (62 in) = 27.90 in inseam | 28 in inseam = 62.22 in (≈ 5’2.2″) |
| 5’4″ (64 in) = 28.80 in inseam | 29 in inseam = 64.44 in (≈ 5’4.4″) |
| 5’6″ (66 in) = 29.70 in inseam | 30 in inseam = 66.67 in (≈ 5’6.7″) |
| 5’8″ (68 in) = 30.60 in inseam | 31 in inseam = 68.89 in (≈ 5’8.9″) |
| 5’9″ (69 in) = 31.05 in inseam | 32 in inseam = 71.11 in (≈ 5’11.1″) |
| 5’10” (70 in) = 31.50 in inseam | 33 in inseam = 73.33 in (≈ 6’1.3″) |
| 6’0″ (72 in) = 32.40 in inseam | 34 in inseam = 75.56 in (≈ 6’3.6″) |
| 6’2″ (74 in) = 33.30 in inseam | 36 in inseam = 80.00 in (≈ 6’8″) |
| 6’4″ (76 in) = 34.20 in inseam | 38 in inseam = 84.44 in (≈ 7’0.4″) |
| Formulas (same logic as the calculator): inseam = height × 0.45 and height = inseam ÷ 0.45. | |
| Height to Inseam | Inseam to Height |
|---|---|
| 150 cm = 67.50 cm inseam | 70 cm inseam = 155.56 cm height |
| 155 cm = 69.75 cm inseam | 72 cm inseam = 160.00 cm height |
| 160 cm = 72.00 cm inseam | 74 cm inseam = 164.44 cm height |
| 165 cm = 74.25 cm inseam | 76 cm inseam = 168.89 cm height |
| 170 cm = 76.50 cm inseam | 78 cm inseam = 173.33 cm height |
| 175 cm = 78.75 cm inseam | 80 cm inseam = 177.78 cm height |
| 180 cm = 81.00 cm inseam | 82 cm inseam = 182.22 cm height |
| 185 cm = 83.25 cm inseam | 84 cm inseam = 186.67 cm height |
| 190 cm = 85.50 cm inseam | 86 cm inseam = 191.11 cm height |
| 195 cm = 87.75 cm inseam | 88 cm inseam = 195.56 cm height |
| Formulas (same logic as the calculator): inseam = height × 0.45 and height = inseam ÷ 0.45. | |
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Height to Inseam Length Formula
The following proportional equation calculates inseam at an assumed share p of height. The default p = 0.45 and the 0.43,0.47 and0.48 presets are what-if assumptions, not population averages or body-type classifications:
Variables:
- IL is inseam at the selected proportion (same length unit as H)
- H is the entered height, or height algebraically implied by the chosen proportion
For the default assumption, multiply height by0.45. Changing the chosen percentage changes the relationship; the result is not a prediction of an individual’s measurement.
What is Inseam Length?
On a garment, inseam is the inside seam from crotch to hem. Body and cycling measurements can use different endpoints. Measure directly and follow the maker’s instructions for tailoring or bike fit; a height proportion cannot establish a fitted size. See Levi’s measurement guidance.
How to Calculate Inseam Length from Height?
The following steps outline how to calculate a length at the chosen proportion:
- Choose the task, enter the known length with its unit, and choose the proportion. Feet-and-inches height uses whole feet and additional inches below12; a blank component means zero.
- Apply IL = H × p for inseam, or H = IL ÷ p for height. A custom p must be greater than0 and below1 (0% to100%, endpoints excluded).
- Select Calculate to see the proportional length in inches, centimeters, feet/inches and meters. Decimal-place settings affect the display, not the calculation.
- Verify your calculated value using the calculator above.
Example Problem:
For example, at height70 inches and an assumed45% proportion, the calculated inseam is:
IL = 70 * 0.45 = 31.5 inches
