100 Pounds per square inch to Bar (100 psi to bar)
100 Pounds per square inch equals 6.8948 Bar. Below is the formula, the worked arithmetic, and what 100 psi typically represents in everyday use.
Formula and worked answer
Formula
bar = psi × 0.0689476
Substituting 100 for psi: 100 × 0.0689476 = 6.8948 bar. The factor 0.0689476 comes from the exact international definition of the Pound per square inch relative to the Bar, so this answer is precise rather than rounded.
What does 100 Pounds per square inch represent?
100 psi (6.89 bar) is a typical upper-end pressure for US bicycle road-tyre recommendations and a common reference on American floor-pump pressure gauges sold through bike shops. Converted to metric the figure is 6.89 bar, which European road-cycling tyre-pressure recommendations instead post as 6.9 bar or 7.0 bar on equivalent tyres. The 0.11 bar gap with 7.0 bar matters at the pump: a US road cyclist naively translating "100 psi" to "7.0 bar" over-inflates by 11 kPa, which is enough to harden the ride on sub-25 mm tyres and reduce rolling-resistance gains, since modern tyre research suggests pressures above 90 psi on ordinary roads run slower than 80 psi.
Values near 100 psi
- 95 psi=6.55 bar
- 96 psi=6.619 bar
- 97 psi=6.6879 bar
- 98 psi=6.7569 bar
- 99 psi=6.8258 bar
- 101 psi=6.9637 bar
- 102 psi=7.0327 bar
- 103 psi=7.1016 bar
- 104 psi=7.1706 bar
- 105 psi=7.2395 bar
psi to bar reference table around 100
| psi | bar |
|---|---|
| 50 psi | 3.4474 bar |
| 75 psi | 5.1711 bar |
| 95 psi | 6.55 bar |
| 99 psi | 6.8258 bar |
| 100 psi | 6.8948 bar |
| 101 psi | 6.9637 bar |
| 105 psi | 7.2395 bar |
| 125 psi | 8.6184 bar |
| 150 psi | 10.3421 bar |
| 200 psi | 13.7895 bar |
Convert a different value
Looking for a different number of Pounds per square inch? Use the full psi to bar converter to enter any value, see the worked formula, and read the full background on the Pound per square inch and the Bar. To go the other direction, the bar to psi converter applies the inverse factor and is the page to bookmark if you usually start in Bar.