Inch-Ounce to Tons of TNT
in-oz
tTNT
Conversion History
| Conversion | Reuse | Delete |
|---|---|---|
| No conversion history to show. | ||
Quick Reference Table (Inch-Ounce to Tons of TNT)
| Inch-Ounce (in-oz) | Tons of TNT (tTNT) |
|---|---|
| 1 | 0.00000000000168775139 |
| 10 | 0.0000000000168775139 |
| 20 | 0.00000000003375502779 |
| 40 | 0.00000000006751005559 |
| 80 | 0.00000000013502011117 |
| 100 | 0.00000000016877513896 |
| 160 | 0.00000000027004022234 |
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 Tons of TNT (tTNT)
A ton of TNT equals 4,184,000,000 joules (4.184 GJ) and is the standard unit for large conventional bombs, non-nuclear explosives, and the lower end of nuclear weapon yields. The Massive Ordnance Air Blast (MOAB), the largest non-nuclear bomb in the US arsenal, has a yield of about 11 tons of TNT. The Hiroshima atomic bomb released the equivalent of approximately 15,000 tons (15 kilotons) of TNT.
The largest conventional bomb (MOAB) yields about 11 tons of TNT. A V2 rocket warhead carried about 1 ton of TNT.
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.
Tons of TNT – Frequently Asked Questions
How powerful is one ton of TNT in real terms?
One ton of TNT releases 4.184 GJ — roughly the energy of 120 liters of petrol or the electricity an average US home uses in 1.2 days. In blast terms, one ton of TNT in open air produces lethal overpressure within about 15–20 meters and can shatter windows at 100+ meters. The MOAB bomb (11 tons TNT) flattened structures across a 150-meter radius.
What is the difference between a ton of TNT, a kiloton, and a megaton?
They differ by factors of 1,000: 1 kiloton = 1,000 tons, 1 megaton = 1,000,000 tons. Conventional bombs are rated in tons (the MOAB is 11 tons). Tactical nuclear weapons are rated in kilotons (Hiroshima was ~15 kt). Strategic thermonuclear warheads are rated in megatons (modern US warheads are 0.3–0.475 Mt). The scale spans nine orders of magnitude.
How many tons of TNT was the Beirut port explosion in 2020?
The 2020 Beirut explosion was caused by 2,750 tonnes of ammonium nitrate and was estimated at roughly 500–1,100 tons of TNT equivalent. For comparison, the Oklahoma City bombing (1995) was about 2 tons TNT equivalent, and the Halifax explosion (1917) was roughly 2,900 tons. Beirut ranked among the largest non-nuclear explosions in history.
How is tons of TNT used for meteor and asteroid impact energy?
Small meteor airbursts are rated in tons or kilotons of TNT. The 2013 Chelyabinsk meteor released about 440,000 tons (440 kt) — roughly 30 times the Hiroshima bomb. The Tunguska event (1908) is estimated at 3–15 megatons. The Chicxulub asteroid that ended the dinosaurs released roughly 100 trillion tons (100 million megatons) of TNT equivalent energy.
What is the largest conventional (non-nuclear) explosion in tons of TNT?
The largest planned non-nuclear explosion was the British demolition of Heligoland fortifications in 1947, using 6,700 tons of TNT equivalent. The largest accidental explosion was the Halifax harbour disaster (1917) at roughly 2,900 tons. The largest conventional bomb, the US GBU-43/B MOAB, yields about 11 tons — tiny compared to accidental industrial blasts.