Mass and Weight · Unit Converter

Convert Atomic Mass Unit to Kilogram-force square second/meter

Convert atomic mass unit to kilogram-force square second/meters instantly. 1 atomic mass unit = 1.69328e-28 kilogram-force square second/meter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilogram-force square second/meter to Atomic Mass Unit converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.

Mass and Weight category 2 min read Published June 10, 2026 Last reviewed June 10, 2026 Updated June 10, 2026

Units explained

Scientific / Atomic

Atomic Mass Unit

What is a atomic mass unit?

One unified atomic mass unit (u) is defined as 1/12 the mass of a carbon-12 atom, about 1.6605E-27 kg.

Origin of the atomic mass unit

Introduced to give atomic and molecular masses convenient numerical values.

Where it is used

Atomic, molecular, and nuclear physics and chemistry.

When and where it was developed

The unified (carbon-12) scale was adopted by IUPAC and IUPAP in 1960-1961.

Force / Engineering

Kilogram-force square second/meter

What is a kilogram-force square second/meter?

The kilogram-force second-squared per meter (the hyl or TME) is about 9.807 kg.

Origin of the kilogram-force square second/meter

The mass unit of the metric gravitational (technical) system.

Where it is used

Older continental European engineering practice.

When and where it was developed

Used in the metric technical system before SI adoption.

Atomic Mass Unit to Kilogram-force square second/meter conversion formula

The relationship between atomic mass unit and kilogram-force square second/meters:

1 u = 1.69328e-28 hyl

1 hyl = 5.905699e+27 u

To convert atomic mass unit to kilogram-force square second/meters, multiply the value in atomic mass unit by 1.69328e-28. To reverse, multiply kilogram-force square second/meters by 5.905699e+27.

How to use this converter

Type a value into the calculator. The result in kilogram-force square second/meters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Kilogram-force square second/meter to Atomic Mass Unit converter for the reverse direction.

Step-by-step: convert atomic mass unit to kilogram-force square second/meters

Write down the value in atomic mass unit (u).
Multiply that value by the factor 1.69328e-28.
The product is the equivalent value in kilogram-force square second/meters (hyl).
To reverse, multiply the kilogram-force square second/meter value by 5.905699e+27.

Worked examples

Example 1 — Convert 1 u to hyl:
1 × 1.69328e-28 = 1.69328e-28 hyl

Example 2 — Convert 100 u to hyl:
100 × 1.69328e-28 = 1.69328e-26 hyl

Real-world example — From sub-micron to human scale

One billion atomic mass unit equals one kilogram-force square second/meter — the conversion that drives home the gulf between atomic-scale features and everyday objects in physics curricula.

1e+9 u × 1.69328e-28 = 1.69328e-19 hyl

Real-world example — Bridging nine orders of magnitude

500 million atomic mass unit equals a value comfortably in the human-scale kilogram-force square second/meters range. Physics problems that span this gap are common when comparing the wavelength of light to the path length of an experiment.

5e+8 u × 1.69328e-28 = 8.466399e-20 hyl

Atomic Mass Unit to Kilogram-force square second/meter conversion table

Standard reference values for converting atomic mass unit to kilogram-force square second/meters:

Atomic Mass Unit [u]	Kilogram-force square second/meter [hyl]
0.01	1.69328e-30
0.1	1.69328e-29
1	1.69328e-28
2	3.38656e-28
3	5.079839e-28
4	6.773119e-28
5	8.466399e-28
10	1.69328e-27
20	3.38656e-27
30	5.079839e-27
40	6.773119e-27
50	8.466399e-27
100	1.69328e-26
500	8.466399e-26
1000	1.69328e-25

Frequently asked questions

How many kilogram-force square second/meters is 1 atomic mass unit?

1 atomic mass unit equals 1.69328e-28 kilogram-force square second/meter.

How do I convert atomic mass unit to kilogram-force square second/meters?

Multiply the value in atomic mass unit by 1.69328e-28 to get kilogram-force square second/meters.

How do I convert kilogram-force square second/meters back to atomic mass unit?

Multiply the value in kilogram-force square second/meters by 5.905699e+27, or use the Kilogram-force square second/meter to Atomic Mass Unit converter.

How many kilogram-force square second/meters is 100 atomic mass unit?

100 atomic mass unit equals 1.69328e-26 kilogram-force square second/meters, because 100 × 1.69328e-28 = 1.69328e-26.

Convert Atomic Mass Unit to other weight units

Show all Atomic Mass Unit conversions

Metric / SI (18 units)

Avoirdupois (15 units)

Troy & Apothecary (10 units)

Atomic Mass Unit to Point (1/100 carat) (pt) Atomic Mass Unit to Carat (metric) (ct) Atomic Mass Unit to Scruple (apothecary) (s ap) Atomic Mass Unit to Pennyweight (dwt) Atomic Mass Unit to Momme (mom) Atomic Mass Unit to Mace (mace) Atomic Mass Unit to Dram (apothecary/troy) (dr ap) Atomic Mass Unit to Troy Ounce (oz t) Atomic Mass Unit to Tael (tael) Atomic Mass Unit to Pound (troy/apothecary) (lb t)

Indian / South Asian (6 units)

Atomic Mass Unit to Ratti (ratti) Atomic Mass Unit to Masha (masha) Atomic Mass Unit to Tola (tola) Atomic Mass Unit to Chittack (Chatank) (chittack) Atomic Mass Unit to Seer (Ser) (seer) Atomic Mass Unit to Maund (Mann) (maund)

Scientific / Atomic (8 units)

Atomic Mass Unit to Electron Mass (rest) (me) Atomic Mass Unit to MeV/c2 (MeV/c²) Atomic Mass Unit to Muon Mass (mµ) Atomic Mass Unit to Proton Mass (mp) Atomic Mass Unit to Neutron Mass (mn) Atomic Mass Unit to Deuteron Mass (md) Atomic Mass Unit to Carbon-12 Atom Mass (C-12) Atomic Mass Unit to Planck Mass (mP)

Astronomical (4 units)

Atomic Mass Unit to Lunar Mass (Moon) (M☾) Atomic Mass Unit to Earth's Mass (M⊕) Atomic Mass Unit to Jupiter Mass (MJ) Atomic Mass Unit to Sun's Mass (M☉)

Biblical / Ancient (14 units)

Force / Engineering (5 units)

Atomic Mass Unit to Poundal (pdl) Atomic Mass Unit to Ton (assay) (US) (AT) Atomic Mass Unit to Ton (assay) (UK) (AT) Atomic Mass Unit to Kilogram-force square second/meter (hyl) Atomic Mass Unit to Slug (slug)

Sources & references

Conversion factor (1 u = 1.69328e-28 hyl) verified against the following authoritative sources:

BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.

Results are provided for general reference. Verify critical measurements against an authoritative standard.