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Pounds and Ounces Calculator

This calculator combines nonnegative avoirdupois pounds and ounces into total ounces. It also reports decimal pounds and equivalent metric mass.

Published

Total weight

Ounces total
56 oz
Total ounces
56 oz
Total pounds
3.5 lb
Kilograms
1.58757 kg
Grams
1,587.57 g
Normalized lb + oz
3 lb 8 oz

3 lb plus 8 oz equals 3.5 lb.

Whole or decimal pounds to include in the total.
lb
Additional ounces to combine with the pounds.
oz

Results update as you type.

Worked example

pounds: 3 · ounces: 8

Result: 56 oz

Try it →

Pounds and ounces calculator

This calculator combines nonnegative avoirdupois pounds and ounces into total ounces. It also reports decimal pounds and equivalent metric mass.

Formula

total oz=(lb×16)+additional oz\text{total oz}=(\text{lb}\times16)+\text{additional oz}

For 3 lb and 8 oz, the total is 56 oz, or 3.5 lb. For the boundary case of 0 lb and 8 oz, the result is 8 oz. The normalized row carries each complete group of 16 ounces into pounds.

Related mass converters: the pounds to ounces converter, the ounces to pounds converter, and the pounds to kilograms calculator. For metric mass in decagrams, ten grams, the decagram to gram converter handles the dag unit directly.

Compare Pounds and Ounces Calculator with related tools

All comparisons →
Pounds and Ounces vs Pounds to StoneCompare expressing a pound weight in ounces — combining pounds and ounces into total ounces, decimal pounds, and metric mass — with converting pounds to the 14-pound stone unit and back.

Frequently asked questions

How are pounds and ounces combined?
Multiply pounds by 16 and add the additional ounces.

Sources

  • BIPM-SI-9-3.02

    primary · Jul 9, 2026

    Supports: SI base/derived units, prefixes, coherent dimensional relations, exact defining constants, day and degree accepted with SI; this route applies 3*16 + 8 (exact defined/conventional relationship).

    — v9th edition, version 3.02 (August 2025)

  • NIST-SP811-2008

    primary · Jul 9, 2026

    Supports: US customary/SI conversion factors and precision/significant-digit guidance; this route applies 3*16 + 8 (exact defined/conventional relationship).

    — vNIST SP 811, 2008 edition

  • NIST-HB44-2026

    primary · Jul 9, 2026

    Supports: US customary length, mass, liquid-volume, pressure and exact legal-metrology relationships; this route applies 3*16 + 8 (exact defined/conventional relationship).

    — vNIST Handbook 44, 2026 edition

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