Femtometer is 1e-15 meter units.
Femtometers to US survey feet Converter — fm to ftUS
Convert Femtometer (fm) to US survey foot (ftUS) using the exact conversion factor (1 femtometer = 3.280833e-15 us survey foot). See the formula, worked examples, and conversion table.
Femtometers to US survey feet converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
The US survey foot is 1200/3937 meters and is retained for legacy land records.
Result = input x 1e-15 / 0.3048006096.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtometers to US survey feet
Femtometer and US survey foot both measure length. Specifically: Femtometer is 1e-15 meter units, and the US survey foot is 1200/3937 meters and is retained for legacy land records.
Formula
us survey feet = femtometers × 3.280833e-15
This factor comes from each unit's defined relationship to the category's base unit: 1 femtometer equals 1e-15 base units, and 1 us survey foot equals 0.304800609601 base units, so dividing one by the other gives the direct femtometer-to-us survey foot factor of 3.280833e-15.
Simple example
1 fm × 3.280833e-15 = 3.280833e-15 ftUS
1 femtometer = 3.280833e-15 us survey feet.
Real-world example
10 fm × 3.280833e-15 = 3.280833e-14 ftUS
10 femtometers = 3.280833e-14 us survey feet.
Conversion table
| Femtometer (fm) | US survey foot (ftUS) |
|---|---|
| 1 fm | 3.280833e-15 ftUS |
| 5 fm | 1.640417e-14 ftUS |
| 10 fm | 3.280833e-14 ftUS |
| 21.0975 fm | 6.921738e-14 ftUS |
| 42.195 fm | 1.384348e-13 ftUS |
| 100 fm | 3.280833e-13 ftUS |
Reverse conversion: US survey foot to Femtometer
3.280833e-15 ftUS × 3.048006e+14 = 0.9999998984 fm
3.280833e-15 us survey feet = 0.9999998984 femtometers.
femtometers = us survey feet × 3.048006e+14
For a page dedicated to this direction, see US survey foot to Femtometer.
Understanding the Femtometer (fm)
Femtometer is 1e-15 meter units.
Understanding the US survey foot (ftUS)
The US survey foot is 1200/3937 meters and is retained for legacy land records.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many us survey feet are in 1 femtometer?
1 femtometer equals 3.280833e-15 us survey feet, using the exact defined conversion factor rather than an estimate.
How do I convert femtometer to us survey foot?
Multiply the femtometer value by 3.280833e-15. The converter above does this instantly to whatever precision you set.
How do I convert us survey foot back to femtometer?
Use the reverse factor: 1 us survey foot equals 3.048006e+14 femtometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtometer?
Femtometer (fm) is a unit of length.
What is a us survey foot?
US survey foot (ftUS) is a unit of length.
Is the femtometer to us survey foot conversion exact?
Yes. Both femtometer and us survey foot are defined by fixed standards rather than physical artifacts, so the factor of 3.280833e-15 used above is exact to as many digits as you choose to display.