Atomic Mass Unit to Scruple Converter

Mass Converter

26 units available

Decimals:

From

To

1.281302e-24

1 u = 1.281302e-24 scr

Formula:

scr = u × 1.281302e-24

With your value: 1 u = 1.281302e-24 scr

How big is that?

Everyday references on a logarithmic scale, all expressed in atomic mass unit so you can sanity-check the result.

Your value1.00 u

Paperclip (6.0e+23× your value)6.02e+23 u

AA battery (1.4e+25× your value)1.45e+25 u

Can of soda (2.3e+26× your value)2.35e+26 u

Bag of sugar (6.0e+26× your value)6.02e+26 u

House cat (2.7e+27× your value)2.71e+27 u

Other Atomic Mass Unit to Scruple conversions

2 u to scr 3 u to scr 4 u to scr 5 u to scr 6 u to scr 7 u to scr 8 u to scr

Atomic Mass Unit to Scruple Conversion Table

Atomic Mass Unit (u)	Scruple (scr)
0.5	6.406508e-25
1	1.281302e-24
2	2.562603e-24
5	6.406508e-24
10	1.281302e-23
15	1.921953e-23
20	2.562603e-23
25	3.203254e-23
50	6.406508e-23
100	1.281302e-22
250	3.203254e-22
500	6.406508e-22
1000	1.281302e-21

Scruple to Atomic Mass Unit Conversion Table

Scruple (scr)	Atomic Mass Unit (u)
0.5	3.902282e+23
1	7.804563e+23
2	1.560913e+24
5	3.902282e+24
10	7.804563e+24
15	1.170684e+25
20	1.560913e+25
25	1.951141e+25
50	3.902282e+25
100	7.804563e+25
250	1.951141e+26
500	3.902282e+26
1000	7.804563e+26

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Atomic Mass Unit (u)

Mass

Measured constant

The unified atomic mass unit is 1/12 the mass of a free carbon-12 atom: 1.660 539 068 92(52) × 10⁻²⁷ kg.

Experimentally determined; the last digits carry the CODATA 2022 uncertainty.

Source: CODATA Internationally Recommended Values of the Fundamental Physical Constants (2022 adjustment)

CODATA / NIST · Reviewed 2026-07-01

Scruple (scr)

Mass

Exact conversion

Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Atomic Mass Unit to Scruple

To convert from Atomic Mass Unit (u) to Scruple (scr), multiply the value by 1.281302e-24.

Formula: scr = u × 1.281302e-24

Reverse: u = scr × 7.804563e+23

Step-by-Step Example

Start with your value in Atomic Mass Unit. For example: 5 u
Multiply by the conversion factor: 5 x 1.281302e-24
The result is: 6.406508e-24 scr

About Atomic Mass Unit

The unified atomic mass unit (dalton) is 1/12 the mass of a carbon-12 atom, about 1.66054×10⁻²⁷ kg.

Common uses: chemistry, mass spectrometry, molecular biology.

About Scruple

The scruple (scr) is a unit of mass and weight. One scruple equals 0.0012959782 kilograms. UnitConvertLab converts it against every other mass unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: mass calculations, engineering and science, education.

Frequently Asked Questions

How many Scruple are in 1 Atomic Mass Unit?

There are exactly 1.281302e-24 Scruple in 1 Atomic Mass Unit. This means the conversion factor from Atomic Mass Unit to Scruple is 1.281302e-24.

What is the formula to convert Atomic Mass Unit to Scruple?

The formula to convert Atomic Mass Unit to Scruple is: scr = u × 1.281302e-24. For example, to convert 10 Atomic Mass Unit to Scruple, you would multiply 10 by 1.281302e-24.

What is a Atomic Mass Unit?