| foot per hour | 1 fph | 2 fph | 3 fph | 4 fph | 5 fph | 6 fph | 7 fph | 8 fph | 9 fph | 10 fph | 11 fph | 12 fph | 13 fph | 14 fph | 15 fph | 16 fph | 17 fph | 18 fph | 19 fph | 20 fph | 21 fph | 22 fph | 23 fph | 24 fph | 25 fph | 26 fph | 27 fph | 28 fph | 29 fph | 30 fph | 31 fph | 32 fph | 33 fph | 34 fph | 35 fph | 36 fph | 37 fph | 38 fph | 39 fph | 40 fph | 41 fph | 42 fph | 43 fph | 44 fph | 45 fph | 46 fph | 47 fph | 48 fph | 49 fph | 50 fph | 51 fph | 52 fph | 53 fph | 54 fph | 55 fph | 56 fph | 57 fph | 58 fph | 59 fph | 60 fph | 61 fph | 62 fph | 63 fph | 64 fph | 65 fph | 66 fph | 67 fph | 68 fph | 69 fph | 70 fph | 71 fph | 72 fph | 73 fph | 74 fph | 75 fph | 76 fph | 77 fph | 78 fph | 79 fph | 80 fph | 81 fph | 82 fph | 83 fph | 84 fph | 85 fph | 86 fph | 87 fph | 88 fph | 89 fph | 90 fph | 91 fph | 92 fph | 93 fph | 94 fph | 95 fph | 96 fph | 97 fph | 98 fph | 99 fph | 100 fph |
| speed of sound (32 °F) | 2.5563607085346 × 10-7 s | 5.1127214170692 × 10-7 s | 7.6690821256039 × 10-7 s | 1.0225442834138 × 10-6 s | 1.2781803542673 × 10-6 s | 1.5338164251208 × 10-6 s | 1.7894524959742 × 10-6 s | 2.0450885668277 × 10-6 s | 2.3007246376812 × 10-6 s | 2.5563607085346 × 10-6 s | 2.8119967793881 × 10-6 s | 3.0676328502415 × 10-6 s | 3.323268921095 × 10-6 s | 3.5789049919485 × 10-6 s | 3.8345410628019 × 10-6 s | 4.0901771336554 × 10-6 s | 4.3458132045089 × 10-6 s | 4.6014492753623 × 10-6 s | 4.8570853462158 × 10-6 s | 5.1127214170692 × 10-6 s | 5.3683574879227 × 10-6 s | 5.6239935587762 × 10-6 s | 5.8796296296296 × 10-6 s | 6.1352657004831 × 10-6 s | 6.3909017713366 × 10-6 s | 6.64653784219 × 10-6 s | 6.9021739130435 × 10-6 s | 7.1578099838969 × 10-6 s | 7.4134460547504 × 10-6 s | 7.6690821256039 × 10-6 s | 7.9247181964573 × 10-6 s | 8.1803542673108 × 10-6 s | 8.4359903381643 × 10-6 s | 8.6916264090177 × 10-6 s | 8.9472624798712 × 10-6 s | 9.2028985507246 × 10-6 s | 9.4585346215781 × 10-6 s | 9.7141706924316 × 10-6 s | 9.969806763285 × 10-6 s | 1.0225442834138 × 10-5 s | 1.0481078904992 × 10-5 s | 1.0736714975845 × 10-5 s | 1.0992351046699 × 10-5 s | 1.1247987117552 × 10-5 s | 1.1503623188406 × 10-5 s | 1.1759259259259 × 10-5 s | 1.2014895330113 × 10-5 s | 1.2270531400966 × 10-5 s | 1.252616747182 × 10-5 s | 1.2781803542673 × 10-5 s | 1.3037439613527 × 10-5 s | 1.329307568438 × 10-5 s | 1.3548711755233 × 10-5 s | 1.3804347826087 × 10-5 s | 1.405998389694 × 10-5 s | 1.4315619967794 × 10-5 s | 1.4571256038647 × 10-5 s | 1.4826892109501 × 10-5 s | 1.5082528180354 × 10-5 s | 1.5338164251208 × 10-5 s | 1.5593800322061 × 10-5 s | 1.5849436392915 × 10-5 s | 1.6105072463768 × 10-5 s | 1.6360708534622 × 10-5 s | 1.6616344605475 × 10-5 s | 1.6871980676329 × 10-5 s | 1.7127616747182 × 10-5 s | 1.7383252818035 × 10-5 s | 1.7638888888889 × 10-5 s | 1.7894524959742 × 10-5 s | 1.8150161030596 × 10-5 s | 1.8405797101449 × 10-5 s | 1.8661433172303 × 10-5 s | 1.8917069243156 × 10-5 s | 1.917270531401 × 10-5 s | 1.9428341384863 × 10-5 s | 1.9683977455717 × 10-5 s | 1.993961352657 × 10-5 s | 2.0195249597424 × 10-5 s | 2.0450885668277 × 10-5 s | 2.070652173913 × 10-5 s | 2.0962157809984 × 10-5 s | 2.1217793880837 × 10-5 s | 2.1473429951691 × 10-5 s | 2.1729066022544 × 10-5 s | 2.1984702093398 × 10-5 s | 2.2240338164251 × 10-5 s | 2.2495974235105 × 10-5 s | 2.2751610305958 × 10-5 s | 2.3007246376812 × 10-5 s | 2.3262882447665 × 10-5 s | 2.3518518518519 × 10-5 s | 2.3774154589372 × 10-5 s | 2.4029790660225 × 10-5 s | 2.4285426731079 × 10-5 s | 2.4541062801932 × 10-5 s | 2.4796698872786 × 10-5 s | 2.5052334943639 × 10-5 s | 2.5307971014493 × 10-5 s | 2.5563607085346 × 10-5 s |
Foot per hour is unit of speed or velocity. It equals 0.00008466 meter per second. Plural name is feet / hour.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| foot per hour | fph | ≡ 1 ft/s ≡ 0.3048m/3600s | = 8.46×10−5 m/s | Imperial/US |
| feet per hour | speed of sounds (32 °F) | feet per hour | speed of sounds (32 °F) |
|---|---|---|---|
| 1 | ≈ 2.5563607085346E-7 | 6 | ≈ 1.5338164251208E-6 |
| 2 | ≈ 5.1127214170692E-7 | 7 | ≈ 1.7894524959742E-6 |
| 3 | ≈ 7.6690821256039E-7 | 8 | ≈ 2.0450885668277E-6 |
| 4 | ≈ 1.0225442834138E-6 | 9 | ≈ 2.3007246376812E-6 |
| 5 | ≈ 1.2781803542673E-6 | 10 | ≈ 2.5563607085346E-6 |
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. In dry air at 0 °C (32 °F), the speed of sound is 331.2 metres per second (1,087 ft/s; 1,192 km/h; 741 mph; 644 kn). At 20 °C (68 °F), the speed of sound is 343 metres per second (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or a kilometre in 2.91 s or a mile in 4.69 s.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| speed of sound (32 °F) | s | 225 to 1062 km/h (761–660 mph or 661–574 kn) | ≈ 340 to 295 m/s | Other Speed |
| speed of sounds (32 °F) | feet per hour | speed of sounds (32 °F) | feet per hour |
|---|---|---|---|
| 1 | ≈ 3911811.023622 | 6 | ≈ 23470866.141732 |
| 2 | ≈ 7823622.0472441 | 7 | ≈ 27382677.165354 |
| 3 | ≈ 11735433.070866 | 8 | ≈ 31294488.188976 |
| 4 | ≈ 15647244.094488 | 9 | ≈ 35206299.212598 |
| 5 | ≈ 19559055.11811 | 10 | ≈ 39118110.23622 |
| feet per hour | speed of sounds (32 °F) |
|---|---|
| 1 | ≈ 2.5563607085346 × 10-7 |
| 3,911,811.023622 | ≈ 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |