BTU per hour | 1 BTUIT/h | 2 BTUIT/h | 3 BTUIT/h | 4 BTUIT/h | 5 BTUIT/h | 6 BTUIT/h | 7 BTUIT/h | 8 BTUIT/h | 9 BTUIT/h | 10 BTUIT/h | 11 BTUIT/h | 12 BTUIT/h | 13 BTUIT/h | 14 BTUIT/h | 15 BTUIT/h | 16 BTUIT/h | 17 BTUIT/h | 18 BTUIT/h | 19 BTUIT/h | 20 BTUIT/h | 21 BTUIT/h | 22 BTUIT/h | 23 BTUIT/h | 24 BTUIT/h | 25 BTUIT/h | 26 BTUIT/h | 27 BTUIT/h | 28 BTUIT/h | 29 BTUIT/h | 30 BTUIT/h | 31 BTUIT/h | 32 BTUIT/h | 33 BTUIT/h | 34 BTUIT/h | 35 BTUIT/h | 36 BTUIT/h | 37 BTUIT/h | 38 BTUIT/h | 39 BTUIT/h | 40 BTUIT/h | 41 BTUIT/h | 42 BTUIT/h | 43 BTUIT/h | 44 BTUIT/h | 45 BTUIT/h | 46 BTUIT/h | 47 BTUIT/h | 48 BTUIT/h | 49 BTUIT/h | 50 BTUIT/h | 51 BTUIT/h | 52 BTUIT/h | 53 BTUIT/h | 54 BTUIT/h | 55 BTUIT/h | 56 BTUIT/h | 57 BTUIT/h | 58 BTUIT/h | 59 BTUIT/h | 60 BTUIT/h | 61 BTUIT/h | 62 BTUIT/h | 63 BTUIT/h | 64 BTUIT/h | 65 BTUIT/h | 66 BTUIT/h | 67 BTUIT/h | 68 BTUIT/h | 69 BTUIT/h | 70 BTUIT/h | 71 BTUIT/h | 72 BTUIT/h | 73 BTUIT/h | 74 BTUIT/h | 75 BTUIT/h | 76 BTUIT/h | 77 BTUIT/h | 78 BTUIT/h | 79 BTUIT/h | 80 BTUIT/h | 81 BTUIT/h | 82 BTUIT/h | 83 BTUIT/h | 84 BTUIT/h | 85 BTUIT/h | 86 BTUIT/h | 87 BTUIT/h | 88 BTUIT/h | 89 BTUIT/h | 90 BTUIT/h | 91 BTUIT/h | 92 BTUIT/h | 93 BTUIT/h | 94 BTUIT/h | 95 BTUIT/h | 96 BTUIT/h | 97 BTUIT/h | 98 BTUIT/h | 99 BTUIT/h | 100 BTUIT/h |
femtowatt | 2.93071 × 1014 fW | 5.86142 × 1014 fW | 8.79213 × 1014 fW | 1.172284 × 1015 fW | 1.465355 × 1015 fW | 1.758426 × 1015 fW | 2.051497 × 1015 fW | 2.344568 × 1015 fW | 2.637639 × 1015 fW | 2.93071 × 1015 fW | 3.223781 × 1015 fW | 3.516852 × 1015 fW | 3.809923 × 1015 fW | 4.102994 × 1015 fW | 4.396065 × 1015 fW | 4.689136 × 1015 fW | 4.982207 × 1015 fW | 5.275278 × 1015 fW | 5.568349 × 1015 fW | 5.86142 × 1015 fW | 6.154491 × 1015 fW | 6.447562 × 1015 fW | 6.740633 × 1015 fW | 7.033704 × 1015 fW | 7.326775 × 1015 fW | 7.619846 × 1015 fW | 7.912917 × 1015 fW | 8.205988 × 1015 fW | 8.499059 × 1015 fW | 8.79213 × 1015 fW | 9.085201 × 1015 fW | 9.378272 × 1015 fW | 9.671343 × 1015 fW | 9.964414 × 1015 fW | 1.0257485 × 1016 fW | 1.0550556 × 1016 fW | 1.0843627 × 1016 fW | 1.1136698 × 1016 fW | 1.1429769 × 1016 fW | 1.172284 × 1016 fW | 1.2015911 × 1016 fW | 1.2308982 × 1016 fW | 1.2602053 × 1016 fW | 1.2895124 × 1016 fW | 1.3188195 × 1016 fW | 1.3481266 × 1016 fW | 1.3774337 × 1016 fW | 1.4067408 × 1016 fW | 1.4360479 × 1016 fW | 1.465355 × 1016 fW | 1.4946621 × 1016 fW | 1.5239692 × 1016 fW | 1.5532763 × 1016 fW | 1.5825834 × 1016 fW | 1.6118905 × 1016 fW | 1.6411976 × 1016 fW | 1.6705047 × 1016 fW | 1.6998118 × 1016 fW | 1.7291189 × 1016 fW | 1.758426 × 1016 fW | 1.7877331 × 1016 fW | 1.8170402 × 1016 fW | 1.8463473 × 1016 fW | 1.8756544 × 1016 fW | 1.9049615 × 1016 fW | 1.9342686 × 1016 fW | 1.9635757 × 1016 fW | 1.9928828 × 1016 fW | 2.0221899 × 1016 fW | 2.051497 × 1016 fW | 2.0808041 × 1016 fW | 2.1101112 × 1016 fW | 2.1394183 × 1016 fW | 2.1687254 × 1016 fW | 2.1980325 × 1016 fW | 2.2273396 × 1016 fW | 2.2566467 × 1016 fW | 2.2859538 × 1016 fW | 2.3152609 × 1016 fW | 2.344568 × 1016 fW | 2.3738751 × 1016 fW | 2.4031822 × 1016 fW | 2.4324893 × 1016 fW | 2.4617964 × 1016 fW | 2.4911035 × 1016 fW | 2.5204106 × 1016 fW | 2.5497177 × 1016 fW | 2.5790248 × 1016 fW | 2.6083319 × 1016 fW | 2.637639 × 1016 fW | 2.6669461 × 1016 fW | 2.6962532 × 1016 fW | 2.7255603 × 1016 fW | 2.7548674 × 1016 fW | 2.7841745 × 1016 fW | 2.8134816 × 1016 fW | 2.8427887 × 1016 fW | 2.8720958 × 1016 fW | 2.9014029 × 1016 fW | 2.93071 × 1016 fW |
A BTU per hour (symbol: BTUIT/hour) is the unit of power.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
BTU per hour | BTUIT/h | ≡ 1 BTUIT/h | ≈ 0.293071 W | Imperial/US |
BTU per hour | femtowatts | BTU per hour | femtowatts |
---|---|---|---|
1 | ≈ 2.93071E+14 | 6 | ≈ 1.758426E+15 |
2 | ≈ 5.86142E+14 | 7 | ≈ 2.051497E+15 |
3 | ≈ 8.79213E+14 | 8 | ≈ 2.344568E+15 |
4 | ≈ 1.172284E+15 | 9 | ≈ 2.637639E+15 |
5 | ≈ 1.465355E+15 | 10 | ≈ 2.93071E+15 |
The femtowatt (fW) is equal to one quadrillionth (10−15) of a watt. Technologically important powers that are measured in femtowatts are typically found in reference(s) to radio and radar receivers. For example, meaningful FM tuner performance figures for sensitivity, quieting and signal-to-noise require that the RF energy applied to the antenna input be specified. These input levels are often stated in dBf (decibels referenced to 1 femtowatt). This is 0.2739 microvolt across a 75-ohm load or 0.5477 microvolt across a 300-ohm load; the specification takes into account the RF input impedance of the tuner.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
femtowatt | fW | = 10-15 W | = 10-15 W | Metric system SI |
femtowatts | BTU per hour | femtowatts | BTU per hour |
---|---|---|---|
1 | ≈ 3.412142450123E-15 | 6 | ≈ 2.0472854700738E-14 |
2 | ≈ 6.824284900246E-15 | 7 | ≈ 2.3884997150861E-14 |
3 | ≈ 1.0236427350369E-14 | 8 | ≈ 2.7297139600984E-14 |
4 | ≈ 1.3648569800492E-14 | 9 | ≈ 3.0709282051107E-14 |
5 | ≈ 1.7060712250615E-14 | 10 | ≈ 3.412142450123E-14 |
BTU per hour | femtowatts |
---|---|
1 | ≈ 2.93071 × 1014 |
3.412142450123 × 10-15 | ≈ 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 …) |