Pace (pace) - Unit Information & Conversion
What is a Pace?
Definition
The Pace is a unit of length based on the distance covered by a human step. Its definition is highly variable and depends heavily on context, often referring to either a single step or a double step.
- Single Step Pace: Often informally estimated as the distance from the heel of one foot to the heel of the next foot in a normal walking stride. Common estimations range from 2.5 to 3 feet (ft) or approximately 0.75 to 0.9 meters (m). This is sometimes simply called a 'step' or 'stride'.
- Double Step Pace (Roman Pace): Historically, the most significant definition was the Roman passus, which measured the distance from the heel of one foot to the point where the same foot touches the ground again (i.e., two steps). This was standardized as 5 Roman feet, roughly 1.48 meters or 4.86 feet.
Due to its inherent variability and dependence on individual gait and terrain, the pace is not a standardized unit for precise measurement.
History
The pace is one of the most ancient and intuitive units of length, used across numerous cultures due to its direct link to human locomotion.
- Ancient Rome: The Romans formalized the passus (double step) as 5 pedes (Roman feet). This unit was fundamental to their system, with 1000 passus forming the Roman mile (mille passus), which heavily influenced the definition of the mile in later systems.
- Military Usage: Throughout history, armies used paces (both single and double) for marching cadence, estimating distances, and measuring fortifications or camp layouts. Standardized step lengths were often drilled.
- Informal Measurement: Before widespread standardized rulers and tapes, pacing was a common way for individuals to estimate lengths and distances for land, construction, or travel.
The pace gradually fell out of official use with the rise of standardized systems like the Imperial system (feet, yards) and the Metric system (meters), which offered greater precision and consistency.
Common Uses
While obsolete for official measurements, the pace still finds some use:
- Rough Estimation: Used informally to get a quick approximation of distances, such as the length of a room, a garden plot, or walking distances in hiking or orienteering.
- Military & Marching Bands: Concepts related to pace length and cadence remain relevant in drilling and formation marching.
- Historical Context: Understanding the pace (especially the Roman passus) is crucial for interpreting historical texts, military accounts, and measurements related to ancient structures or distances.
- Exercise & Fitness: Step counters (pedometers) measure activity in terms of steps, which are essentially single paces.
Unit FAQs
How long is a pace?
There is no single standard length for a "pace".
- An informal single step pace is often estimated at 2.5 to 3 feet (0.75 to 0.9 meters).
- The historical Roman pace (passus) was a double step, standardized at 5 Roman feet (approx. 1.48 meters or 4.86 feet). Always clarify which definition is being used.
What is the difference between a pace and a Roman pace?
A "pace" is ambiguous. It can mean a single step (variable length, ~2.5-3 ft) or a double step. The Roman pace (passus) specifically refers to the double step standardized at 5 Roman feet (~1.48 m).
What is the difference between a pace and a step or stride?
Often, "step" or "stride" refers to the distance covered by a single movement of one foot forward (heel-to-heel or toe-to-toe). "Pace" can mean this, but it can also refer to the Roman double step (passus). The ambiguity makes "step" or "stride" slightly clearer when referring to a single foot movement.
How many paces are in a mile?
This depends on the definition of "pace":
- Using the Roman pace (passus): The Roman mile (mille passus) was defined as 1000 paces (double steps).
- Using an informal single step pace: If we estimate a single step pace at 2.5 feet, a statute mile (5280 feet) would contain 5280 / 2.5 = 2112 single paces. If estimated at 3 feet, it would be 5280 / 3 = 1760 single paces. This is highly approximate.
Is the pace an SI unit?
No, the pace is not an SI unit. It is an ancient, non-standardized, anthropomorphic unit. The SI unit for length is the meter (m).
Is the pace still used today?
The pace is not used for any official, scientific, or trade measurements today due to its lack of standardization. Its use is confined to informal distance estimation, historical study, and contexts like military drilling or fitness tracking (as steps).
Pace Conversion Formulas
To Meter:
To Kilometer:
To Hectometer:
To Decimeter:
To Centimeter:
To Millimeter:
To Inch:
To Foot:
To Yard:
To Mile:
To Nautical Mile:
To Micrometer:
To Nanometer:
To Light Year:
To Astronomical Unit:
To Parsec:
To Angstrom:
To Point (Typography):
To Mil/Thou:
To Fathom:
To Furlong:
To Link (Gunter's):
To Span:
To Digit:
To Cable Length:
To Ell:
To Finger:
To Roman Mile:
To Stadion:
To Chi (Chinese):
To Shaku (Japanese):
To Li (Chinese):
To Toise:
To Bolt:
To Rope:
To Smoot:
To Sajene:
To Ken:
To Wa:
To Vara:
To Aln:
To Cubit (Royal/Egyptian):
To Versta:
To Arpent:
To Ri (Japanese):
To Klafter:
To Yojana:
To Skein:
Convert Pace
Need to convert Pace to other length units? Use our conversion tool.
Pace Quick Info
Related Length Units
- Meterm
- Kilometerkm
- Hectometerhm
- Decimeterdm
- Centimetercm
- Millimetermm
- Inchin
- Footft
- Yardyd
- Milemi
- Nautical MileNM
- Micrometerμm
- Nanometernm
- Light Yearly
- Astronomical UnitAU
- Parsecpc
- AngstromÅ
- Point (Typography)pt
- Mil/Thoumil
- Fathomfath
- Furlongfur
- Link (Gunter's)li
- Spanspan
- Digitdigit
- Cable Lengthcb
- Ellell
- Fingerfinger
- Roman Milem.p.
- Stadionstadion
- Chi (Chinese)chi
- Shaku (Japanese)shaku
- Li (Chinese)li
- Toisetoise
- Boltbolt
- Roperope
- Smootsmoot
- Sajenesajene
- Kenken
- Wawa
- Varavara
- Alnaln
- Cubit (Royal/Egyptian)cubit
- Verstaversta
- Arpentarpent
- Ri (Japanese)ri
- Klafterklafter
- Yojanayojana
- Skeinskein