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Mass Flow Rate

mg/hrtomg/s

Convert milligrams per hour (mg/hr) to milligrams per second (mg/s).

Factor1 mg/hr = 0.0002777778 mg/s

Converter

mg/hr

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1mg/s

Rendered to 6 significant figures.

Formula

Formula
mg/s = mg/hr × 0.0002777778

Multiply any value in milligrams per hour by 0.0002777778 to obtain the value in milligrams per second.

Worked example

Convert 3600 mg/hr to mg/s.

  1. 01Start with 3600 mg/hr.
  2. 02Multiply by the conversion factor: 3600 × 0.0002777778 = 1 mg/s.
Result3600 mg/hr = 1 mg/s

Conversion table

mg/hrmg/s
10.00027778
20.00055556
50.0013889
100.0027778
200.0055556
500.013889
1000.027778
2000.055556
5000.13889
10000.27778

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mg/hr to mg/s?
1 mg/hr equals 0.0002777778 mg/s. To convert, multiply the value in milligrams per hour by 0.0002777778.
How do I convert 1 mg/hr to mg/s?
1 mg/hr = 0.000277778 mg/s. For any value, multiply by 0.0002777778.
How do I convert mg/s back to mg/hr?
Divide by the same factor — or equivalently, multiply by 3600. So 1 mg/s = 3600 mg/hr.
When would I need to convert milligram per hour to milligram per second?
Mass flow conversions between mg/hr and mg/s are common in material balances, process stream summaries, bulk solids handling, custody transfer, and equipment sizing where kg/hr, t/hr, lb/hr, and lb/s may all appear in different datasheets or vendor documents.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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