How many mL are in one tsp?

There are 4.9289 millilitres in one teaspoons (us) (1 tsp = 4.9289 mL).

What is the conversion formula for tsp to mL?

The exact conversion formula is: 1 tsp = 4.928921594 mL. This converter uses this formula to give you an accurate result for any value you enter.

Teaspoons (US) to Millilitres Converter

Name: Teaspoons (US) to Millilitres Converter
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

Convert tsp to mL instantly — 1 tsp = 4.928921594 mL. Free, browser-only tool.

Free Teaspoons (US) to Millilitres converter. Type a value in either field for an instant result. Formula: 1 tsp = 4.928921594 mL. No data sent to any server. It runs free in your browser on Gera Tools, with nothing uploaded.

Last updated 30 June 2026 Source: Gera Tools

How do I convert Teaspoons (US) to Millilitres?

To convert Teaspoons (US) (tsp) to Millilitres (mL), use the formula: 1 tsp = 4.928921594 mL. For example, 1 tsp equals 4.9289 mL.

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Teaspoons (US) to Millilitres Converter

This free volume converter converts Teaspoons (US) (tsp) to Millilitres (mL) and back again. The exact conversion factor is 1 tsp = 4.9289 mL, so 10 tsp equals 49.2892 mL.

Type a value in either field — the result updates in real time. The reference table below shows common conversion values at a glance. All calculations run entirely in your browser with no data sent to any server.

Teaspoons (US) (tsp)	Millilitres (mL)
1 tsp	4.9289 mL
5 tsp	24.6446 mL
10 tsp	49.2892 mL
100 tsp	492.8922 mL