Inch-Ounce to Kilowatt Hour
in-oz
kWh
Conversion History
| Conversion | Reuse | Delete |
|---|---|---|
1 in-oz (Inch-Ounce) → 1.96154217062e-9 kWh (Kilowatt Hour) Just now |
Quick Reference Table (Inch-Ounce to Kilowatt Hour)
| Inch-Ounce (in-oz) | Kilowatt Hour (kWh) |
|---|---|
| 1 | 0.00000000196154217062 |
| 10 | 0.00000001961542170618 |
| 20 | 0.00000003923084341237 |
| 40 | 0.00000007846168682473 |
| 80 | 0.00000015692337364947 |
| 100 | 0.00000019615421706183 |
| 160 | 0.00000031384674729894 |
About Inch-Ounce (in-oz)
The inch-ounce (in·oz) is a unit of very small torque equal to approximately 0.007062 joules — 1/16 of an inch-pound. It is used for servo motor torque ratings in model aircraft and small robotics, miniature instrument spring tensions, and the adjustment of precision optical and scientific instruments. Where inch-pounds are too coarse for the application, inch-ounces provide a finer unit without switching to SI.
A small servo motor for a model aircraft may be rated at 40–80 in·oz of torque. A clock escapement spring tension is typically a few in·oz.
About Kilowatt Hour (kWh)
A kilowatt-hour (kWh) is the energy consumed by a 1,000-watt (1 kW) device operating for one hour — equal to 3,600,000 joules. It is the standard unit on residential and commercial electricity bills worldwide. One kWh is a tangible, human-scale quantity: it runs a 60 W lightbulb for 16.7 hours, powers a modern refrigerator for a day, or adds about 6 km of range to a typical electric vehicle. Global electricity consumption and power plant outputs are expressed in terawatt-hours (TWh).
A typical US household uses about 886 kWh per month. Charging an electric vehicle from empty to full takes 50–100 kWh depending on battery size.
Inch-Ounce – Frequently Asked Questions
What are inch-ounces used for in hobby servos and RC models?
RC servo motors are rated by torque in inch-ounces (or oz·in) because the forces involved are tiny. A standard micro servo produces 40–60 in·oz, which is enough to deflect a model aircraft aileron. High-torque digital servos for 1/10-scale RC cars reach 200–400 in·oz. The inch-ounce scale gives hobbyists whole-number specs that are easy to compare.
Why do high-end RC servos specify torque at different voltages (4.8V vs 6V)?
Servo motors produce more torque at higher voltage because the motor windings draw more current and generate a stronger magnetic field. A servo rated at 60 in·oz at 4.8 V might deliver 75 in·oz at 6 V — a 25% boost. RC pilots choose voltage based on the tradeoff: 6 V gives snappier response and more holding torque for aerobatics, but draws more current and generates more heat, reducing servo lifespan. Competition flyers often run 7.4 V for maximum performance, accepting shorter gear life.
Why use inch-ounces instead of newton-meters for small torque values?
Inch-ounces give convenient whole numbers for very small torques where newton-meters would be awkward decimals (e.g., 50 in·oz ≈ 0.353 N·m). The RC hobby, miniature clockwork, and precision instrument industries in the US developed around imperial units, and the convention persists even as SI gains ground. Many datasheets now list both units side by side.
What torque in inch-ounces does a clock or watch mechanism require?
A mechanical wristwatch mainspring delivers roughly 2–5 in·oz of torque. Larger mantel clocks may have mainspring torques of 10–30 in·oz. Escapement adjustments are even finer, sometimes below 1 in·oz. Horologists use inch-ounces (or gram-centimeters) because these scales match the delicate forces in timekeeping mechanisms.
How does inch-ounce torque relate to servo motor performance in robotics?
A servo's inch-ounce rating tells you the maximum force it can exert at one inch from the output shaft. A 100 in·oz servo can hold 100 ounces (6.25 lb) at 1 inch, or 50 ounces at 2 inches. Robotics designers use this to size servos for joint loads — a small robotic arm lifting 1 lb at 4 inches needs at least 64 in·oz, plus a safety margin of 50% or more.
Kilowatt Hour – Frequently Asked Questions
What is the difference between kW and kWh?
A kilowatt (kW) is a rate of energy use — power. A kilowatt-hour (kWh) is a total amount of energy consumed over time. A 2 kW heater running for 3 hours uses 6 kWh. Your electricity meter tracks cumulative kWh, not kW. Confusing the two is one of the most common mistakes in energy discussions, similar to confusing speed with distance.
How many kWh does the average US household use per month?
The US Energy Information Administration puts the national average at about 886 kWh per month (roughly 29 kWh per day). Homes in hot states like Louisiana average over 1,100 kWh due to air conditioning; mild-climate states like Hawaii average under 500 kWh. A household's bill equals kWh consumed multiplied by the local rate, typically $0.10–$0.30 per kWh.
How many kWh does it take to fully charge an electric car?
Most EVs have battery packs of 50–100 kWh. A Tesla Model 3 Long Range holds about 75 kWh; a Rivian R1T about 135 kWh. Charging from empty to full at home costs roughly $7–$20 depending on battery size and local electricity rates. At $0.15/kWh, a 75 kWh charge costs $11.25 — far cheaper than filling a petrol tank for equivalent range.
How much does one kilowatt-hour of electricity cost?
In the US, residential electricity averages about $0.16/kWh nationally but ranges from $0.10 in Louisiana to $0.45 in Hawaii. In Europe, prices are higher: Germany averages €0.30–0.40/kWh. One kWh runs a modern fridge for about 24 hours, powers a 55-inch LED TV for 10 hours, or charges a smartphone roughly 80 times.
How many kWh does a solar panel produce per day?
A standard 400 W residential solar panel produces about 1.2–2.0 kWh per day depending on location, orientation, and weather. In sunny Arizona, expect the high end; in cloudy Seattle, the low end. A typical US home rooftop system of 20 panels (8 kW) generates roughly 25–40 kWh per day — enough to cover most or all of the household's electricity needs.