Cooling power equal to 12,000 BTU/h.
Ton of refrigerations to Femtowatts Converter — TR to fW
Convert Ton of refrigeration (TR) to Femtowatt (fW) using the exact conversion factor (1 ton of refrigeration = 3.516853e+18 femtowatt). See the formula, worked examples, and conversion table.
Ton of refrigerations to Femtowatts converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Femtowatt is 1e-15 watt units.
Result = input x 3516.852842 / 1e-15.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Ton of refrigerations to Femtowatts
Ton of refrigeration and Femtowatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Cooling power equal to 12,000 BTU/h, and femtowatt is 1e-15 watt units.
Formula
femtowatts = ton of refrigerations × 3.516853e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 ton of refrigeration equals 3516.85284207 base units, and 1 femtowatt equals 1e-15 base units, so dividing one by the other gives the direct ton of refrigeration-to-femtowatt factor of 3.516853e+18.
Simple example
1 TR × 3.516853e+18 = 3.516853e+18 fW
1 ton of refrigeration = 3.516853e+18 femtowatts.
Real-world example
100 TR × 3.516853e+18 = 3.516853e+20 fW
100 ton of refrigerations = 3.516853e+20 femtowatts.
Conversion table
| Ton of refrigeration (TR) | Femtowatt (fW) |
|---|---|
| 1 TR | 3.516853e+18 fW |
| 10 TR | 3.516853e+19 fW |
| 50 TR | 1.758426e+20 fW |
| 100 TR | 3.516853e+20 fW |
| 500 TR | 1.758426e+21 fW |
| 1,000 TR | 3.516853e+21 fW |
Reverse conversion: Femtowatt to Ton of refrigeration
3.516853e+18 fW × 2.843451e-19 = 1.000000045 TR
3.516853e+18 femtowatts = 1.000000045 ton of refrigerations.
ton of refrigerations = femtowatts × 2.843451e-19
For a page dedicated to this direction, see Femtowatt to Ton of refrigeration.
Understanding the Ton of refrigeration (TR)
Cooling power equal to 12,000 BTU/h.
Understanding the Femtowatt (fW)
Femtowatt is 1e-15 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtowatts are in 1 ton of refrigeration?
1 ton of refrigeration equals 3.516853e+18 femtowatts, using the exact defined conversion factor rather than an estimate.
How do I convert ton of refrigeration to femtowatt?
Multiply the ton of refrigeration value by 3.516853e+18. The converter above does this instantly to whatever precision you set.
How do I convert femtowatt back to ton of refrigeration?
Use the reverse factor: 1 femtowatt equals 2.843451e-19 ton of refrigerations. You can also use the swap control in the converter above to flip the direction instantly.
What is a ton of refrigeration?
Ton of refrigeration (TR) is a unit of engineering.
What is a femtowatt?
Femtowatt (fW) is a unit of engineering.
Is the ton of refrigeration to femtowatt conversion exact?
Yes. Both ton of refrigeration and femtowatt are defined by fixed standards rather than physical artifacts, so the factor of 3.516853e+18 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.