A pixel has no fixed size on its own, so the same 1,080 pixels can be a tiny icon on a phone or a poster on the wall, and the number that decides is PPI. Quick answer: divide the pixels by the PPI, or pixels per inch. At 96 PPI, 1,080 px is 11.25 in,…
A 300 horsepower engine is about 223.7 kilowatts. Quick answer: Multiply the horsepower by 0.7457. For example, 100 hp is 74.57 kW, 1,000 hp is 745.7 kW and 10,000 hp is 7,457 kW. The horsepower to kW formula Power in kilowatts equals power in horsepower times 0.7457. The factor is 745.7 watts divided by 1,000….
A 200 GSM fabric weighs about 5.9 ounces per square yard. Quick answer: Divide the GSM by 33.9057. For example, 200 GSM is 5.899 oz/yd2, 100 GSM is 2.949 oz/yd2 and 300 GSM is 8.848 oz/yd2. The GSM to oz formula Ounces per square yard equal GSM divided by 33.9057. The last column gives ounces…
A 12 gauge wire is thicker than a 20 gauge wire, which seems backwards until you learn that the scale counts how many times the wire was drawn through a die. Quick answer: for American Wire Gauge, the diameter in millimetres is 0.127 × 92^((36 − gauge) ÷ 39). So 12 AWG is 2.053 mm,…
A tempo of 120 BPM is exactly 2 Hz, which is two beats every second. Quick answer: Divide the BPM by 60. For example, 120 BPM is 2 Hz, 1,200 BPM is 20 Hz and 12,000 BPM is 200 Hz. The BPM to Hz formula Hertz equal beats per minute divided by 60. There are…
Metric pump sheets give m³/h, but US pipes and valves use GPM. Multiply by 4.4029 to match them. Quick answer: multiply the flow in m³/h by 4.4029. For example, 10 m³/h is 44.029 GPM, 50 m³/h is 220.14 GPM and 100 m³/h is 440.29 GPM. The m³/h to GPM formula A cubic metre is 1,000…
When someone says calories about food, they mean kilocalories. So the answer you want is kJ divided by 4.184, and the small calorie is 1,000 times that. Quick answer: divide the kilojoules by 4.184 to get food Calories (kcal). For example, 100 kJ is 23.9 kcal, 1,500 kJ is 358.5 kcal and 2,000 kJ is…
A 5 V supply across a 1,000 ohm resistor pushes 5 mA, a small current of the kind a status light uses. Quick answer: Divide the voltage by the resistance in ohms, then multiply by 1,000. For example, 5 V across 1,000 Ω is 5 mA, 12 V across 470 Ω is 25.532 mA and…
A 50 ohm resistor has a conductance of 0.02 siemens, which is 20 millisiemens. Quick answer: Divide 1 by the resistance in ohms. For example, 50 ohms is 0.02 S, 5 ohms is 0.2 S and 200 ohms is 0.005 S. The ohms to siemens formula Siemens equal one divided by ohms. The siemens is…
An EV took 30 kWh in 4 hours, so the charger delivered an average of 7.5 kW, which is about 33 amps at 230 V. Quick answer: Divide the kWh by the hours to get kW, then turn the kW into amps with the voltage. For example, 10 kWh over 5 h at 230 V…