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Bar to Megapascals (bar to MPa)

Convert bar to megapascals: 1 bar = 0.1 MPa. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

Formula

1 bar = 0.1 MPa

megapascals = bar × 0.1 — reverse: bar = megapascals × 10

The factor is derived from the SI definitions of both units (base unit: Pa) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.

Worked examples

5 bar = 0.5 MPa
12.5 bar = 1.25 MPa
100 bar = 10 MPa

Bar to megapascals conversion table

Bar (bar)	Megapascals (MPa)
1	0.1
2	0.2
3	0.3
4	0.4
5	0.5
6	0.6
7	0.7
8	0.8
9	0.9
10	1
15	1.5
20	2
25	2.5
30	3
40	4
50	5
75	7.5
100	10
200	20
250	25
500	50
1000	100

FAQ

How many megapascals are in one bar?

1 bar = 0.1 MPa. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

What is the formula to convert bar to megapascals?

Multiply the value in bar by 0.1: megapascals = bar × 0.1. For example, 5 bar = 0.5 MPa.

How do I convert megapascals back to bar?

Multiply by the inverse factor 10 (bar = megapascals × 10), or use the megapascals-to-bar page.

Related conversions

Megapascals to bar (reverse)
Pressure Converter — all pressure units in one tool
Psi to Bar
Bar to Psi
Psi to Kilopascals
Kilopascals to Psi
Bar to Kilopascals
Kilopascals to Bar
Atmospheres to Pascals
Pascals to Atmospheres

Machine access

API: GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=bar&to_unit=MPa
MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":5,"from_unit":"bar","to_unit":"MPa"}
Markdown: https://tttkmbb.com/conversion/bar-to-mpa.md · JSON: https://tttkmbb.com/conversion/bar-to-mpa.json (add ?value= for a result) · Units: /api/v1/units?quantity=pressure
OpenAPI operationId: convert_units. Freshness: static. Authentication: none.