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Ton to MBH Converter

Enter the value that you want to convert ton (ton) to MBH or MBH to ton.

1 ton = 12.0000000 MBH

Formula: MBH = ton value × 12.0000000

ton to MBH

ton
120.00000MBH

10 ton = 120.00000 MBH

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Ton vs MBH

About the Ton

Ton (ton) is a unit of power measurement. 1 ton is equal to 12.0000000 MBH.

About the MBH

MBH (MBH) is a unit of power measurement. 1 MBH is equal to 0.0833333 ton.

Power Measurement Across Applications

Power units span from milliwatts in electronics to megawatts in power plants. Engine output is still quoted in horsepower (mechanical, metric, and electrical — all slightly different). HVAC systems rate cooling in tons of refrigeration or BTU/hour. Solar panels specify watts peak. Electric motors list watts or kilowatts. Each industry carries its historical unit preferences, making conversion between them a daily necessity.

ton to MBH metric conversion table

0.01 ton=0.12000 MBH
0.1 ton=1.20000 MBH
1 ton=12.00000 MBH
2 ton=24.00000 MBH
3 ton=36.00000 MBH
4 ton=48.00000 MBH
5 ton=60.00000 MBH
6 ton=72.00000 MBH
7 ton=84.00000 MBH
8 ton=96.00000 MBH
9 ton=108.00000 MBH
10 ton=120.00000 MBH
11 ton=132.00000 MBH
12 ton=144.00000 MBH
13 ton=156.00000 MBH
14 ton=168.00000 MBH
15 ton=180.00000 MBH
16 ton=192.00000 MBH
17 ton=204.00000 MBH
18 ton=216.00000 MBH
19 ton=228.00000 MBH
20 ton=240.00000 MBH
30 ton=360.00000 MBH
40 ton=480.00000 MBH
50 ton=600.00000 MBH
60 ton=720.00000 MBH
70 ton=840.00000 MBH
80 ton=960.00000 MBH
90 ton=1080.00000 MBH
100 ton=1200.00000 MBH
200 ton=2400.00000 MBH
300 ton=3600.00000 MBH
400 ton=4800.00000 MBH
500 ton=6000.00000 MBH
600 ton=7200.00000 MBH
700 ton=8400.00001 MBH
800 ton=9600.00001 MBH
900 ton=10800.00001 MBH
1000 ton=12000.00001 MBH

How to Convert Ton to MBH?

We can convert ton to MBH by using an example.

Example:

Convert 20 Ton to MBH?

We know 1 Ton = 12.0000000 MBH; 1 MBH = 0.0833333 ton.

20 ton = ___MBH

20 × 12.0000000 = 240.00000 MBH (we know 1 ton = 12.0000000 MBH)

Answer:

20 ton = 240.00000 MBH

Tons of Refrigeration to BTU/hr: HVAC Specifications and Equipment Matching

When matching cooling equipment to loads calculated in BTU/hr, you need to convert the tonnage rating to BTU/hr. One ton of refrigeration equals 12,000 BTU/hr (or 12 MBH). This conversion is constant regardless of the equipment type — whether it is a window unit, split system, chiller, or cooling tower, the fundamental definition remains: 1 ton = 12,000 BTU/hr.

  1. Start with the cooling equipment rating in tons.
  2. Multiply by 12,000 to get BTU/hr.
  3. For MBH: multiply tons by 12.
  4. The result is cooling capacity in BTU/hr.
💡 Tip: Window and portable AC units are typically marketed in BTU/hr (e.g., "12,000 BTU window unit" = 1 ton). Central systems use tons (e.g., "3.5-ton split system" = 42,000 BTU/hr). Knowing the conversion helps compare across product categories.

Tons to BTU/hr: Equipment Rating Chart

Standard tonnage ratings expressed in BTU/hr and MBH:

TonMBH
0.5 tons6,000 BTU/hr (6 MBH)
1 ton12,000 BTU/hr (12 MBH)
1.5 tons18,000 BTU/hr (18 MBH)
2 tons24,000 BTU/hr (24 MBH)
2.5 tons30,000 BTU/hr (30 MBH)
3 tons36,000 BTU/hr (36 MBH)
4 tons48,000 BTU/hr (48 MBH)
5 tons60,000 BTU/hr (60 MBH)
10 tons120,000 BTU/hr (120 MBH)
100 tons1,200,000 BTU/hr (1,200 MBH)

Worked Examples: Tons to BTU/hr

Question 1: A 3.5-ton central AC system. What is its cooling capacity in BTU/hr?

Solution:

BTU/hr = tons × 12,000

= 3.5 × 12,000

= 42,000 BTU/hr

Answer: 3.5 tons = 42,000 BTU/hr (42 MBH) cooling capacity.

Question 2: A commercial building has two 15-ton rooftop units. Total BTU/hr?

Solution:

Single unit: 15 × 12,000 = 180,000 BTU/hr

Two units: 2 × 180,000 = 360,000 BTU/hr

Answer: Total cooling = 360,000 BTU/hr (360 MBH or 30 tons combined).

Question 3: A chiller is rated at 250 tons. Express in BTU/hr and MBH.

Solution:

BTU/hr = tons × 12,000

= 250 × 12,000

= 3,000,000 BTU/hr

= 3,000 MBH

Answer: 250 tons = 3,000,000 BTU/hr = 3,000 MBH.

Practice: Tons to BTU/hr

Try solving these on your own to test your understanding:

  1. Convert 2 tons to BTU/hr. (Answer: 24,000 BTU/hr)
  2. A 4.5-ton system. Express in BTU/hr. (Answer: 54,000 BTU/hr)
  3. Convert 20 tons to MBH. (Answer: 240 MBH)
  4. A 500-ton chiller. What is that in BTU/hr? (Answer: 6,000,000 BTU/hr)
  5. A 1-ton portable AC. Express in BTU/hr. (Answer: 12,000 BTU/hr)

Matching Equipment to Load Calculations

HVAC load calculations (Manual J for residential, ASHRAE for commercial) produce results in BTU/hr. Equipment is sold in ton increments. The process: calculate load (e.g., 34,800 BTU/hr), convert to tons (34,800 ÷ 12,000 = 2.9 tons), then select the nearest standard size (3-ton unit = 36,000 BTU/hr). The slight overcapacity (3.4%) is well within the acceptable 0-15% range.

EER, SEER, and BTU/hr

Energy Efficiency Ratio (EER) = cooling BTU/hr ÷ watts consumed. A 12,000 BTU/hr (1-ton) unit consuming 1,000 W has an EER of 12. SEER (Seasonal EER) averages this over a cooling season. Higher EER/SEER means more BTU/hr of cooling per watt of electricity. Federal minimum is SEER 14-15 for residential systems (varies by region). A SEER 20 unit uses 33% less electricity than a SEER 14 unit for the same tonnage.

Key Takeaways

  • 1 ton of refrigeration = 12,000 BTU/hr = 12 MBH.
  • Multiply tons by 12,000 to get BTU/hr.
  • Window ACs are marketed in BTU/hr; central systems in tons.
  • Standard residential sizes: 1.5, 2, 2.5, 3, 3.5, 4, 5 tons.
  • EER relates BTU/hr cooling to watts of electrical input.

Ton to MBH Conversion Formula

MBH = ton × 12.0000000

1 ton = 12.0000000 MBH

1 MBH = 0.0833333 ton

Reverse: ton = MBH × 0.0833333

Frequently Asked Questions

How many MBH are in 1 ton?

There are 12.0000000 MBH in 1 ton. To convert ton to MBH, multiply the value by 12.0000000.

How do I convert ton to MBH?

Multiply your ton value by 12.0000000 to get the equivalent in MBH. For example, 5 ton = 5 × 12.0000000 = 60.00000 MBH.

How do I convert MBH to ton?

Multiply your MBH value by 0.0833333 to get the equivalent in ton. Alternatively, divide by 12.0000000.

What is 10 ton in MBH?

10 ton is equal to 120.00000 MBH.

What is 100 ton in MBH?

100 ton is equal to 1200.00000 MBH.