Calculating BTU Consumption for Cisco Meraki Products
British Thermal Units (BTUs) are a unit of measurement used to quantify energy. Specifically, one BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
Network administrators may need the power rating of Cisco Meraki products in BTUs for energy management purposes. All power consumption data for each Cisco Meraki product is listed in Watts on the respective product datasheets.
This article describes how to convert Watts to BTUs for various Cisco Meraki products and provides some BTU/hr values for popular Cisco Meraki products. See MR Power supplies and cost calculations for additional energy usage data.
Watts to BTU/hr Conversion Formula
1 BTU/hr translates to 0.293071 Watts. Similarly, 3.412141633 BTUs/hr = 1 Watt. Using the Watt value found from the data sheet and following the formula (3.412141633 BTU/hr x (Watts) we can quickly find the BTU/hr consumption of any Cisco Meraki device. For example, the MR33 draws a maximum of 11W as specified by the datasheet.
Figure 1. Power consumption from MR33 datasheet.
Multiplying 11W x 3.412141633 will provide the BTU/hr value of 37.53 BTU/hr.
Generally, a conversion tool should be used to ensure accurate translation. One such conversion tool can be found here.
Device BTU/hr Ratings at Full Load
Note: To calculate total BTU consumption over a specific time period, multiply the BTU/hr value by the number of hours desired.
MX Series
| Device Model | Watts @ Full Load | BTU/hr |
| MX60 | 10 | 34.12 |
| MX60W | 13 | 44.36 |
| MX64 | 10 | 34.12 |
| MX64W | 13 | 44.36 |
| MX65 | 72 | 245.67 |
| MX65W | 79 | 269.56 |
| MX67 | 14 | 47.77 |
| MX67W | 23 | 78.48 |
| MX67C | 17 | 58 |
| MX68 | 79 | 269.56 |
| MX68W | 87 | 296.86 |
| MX68CW | 89 | 303.68 |
| MX75 | 96 | 327.57 |
| MX80 | 32 | 109.19 |
| MX84 | 32 | 109.19 |
| MX85 | 55 | 187.67 |
| MX90 | 35 | 119.42 |
| MX95 | 109 | 371.92 |
| MX100 | 55 | 187.67 |
| MX105 | 123 | 419.69 |
| MX250 | 190 | 648.31 |
| MX400 | 215 | 733.61 |
| MX450 | 190 | 648.31 |
| MX600 | 226 | 771.14 |
| Z1 | 18 | 61.42 |
| Z3 | 50 | 170.61 |
MS Series
Note: MS series switches with PoE capabilities have max power values that are significantly higher due to high PoE load at full capacity. Learn more about PoE support on MS Switches.
| Device Model | Watts @ Full Load | BTU/hr |
| MS22 | 22 | 75.07 |
| MS22P | 465 | 1586.65 |
| MS42 | 58 | 197.90 |
| MS42P | 491 | 1675.36 |
| MS120-8 | 9 | 30.71 |
| MS120-8LP | 88 | 300.27 |
| MS120-8FP | 162 | 552.77 |
| MS120-24 | 18 | 61.42 |
| MS120-24P | 425 | 1450.16 |
| MS120-48 | 36 | 122.84 |
| MS120-48LP | 478 | 1631.00 |
| MS120-48FP | 908 | 3098.22 |
| MS125-24 | 25.6 | 87.35 |
| MS125-24P | 426.1 | 1453.91 |
| MS125-48 | 42 | 143.31 |
| MS125-48LP | 439.8 | 1500.66 |
| MS125-48FP | 845.4 | 2884.62 |
| MS210-24 | 24 | 81.89 |
| MS210-24P | 448 | 1528.64 |
| MS210-48 | 42 | 143.31 |
| MS210-48LP | 490 | 1671.95 |
| MS210-48FP | 882 | 3009.51 |
| MS220-8 | 10 | 34.12 |
| MS220-8P | 159 | 542.53 |
| MS220-24 | 18 | 61.42 |
| MS220-24P | 447 | 1525.23 |
| MS220-48 | 51 | 174.02 |
| MS220-48LP | 505 | 1723.13 |
| MS220-48FP | 903 | 3081.16 |
| MS225-24 | 24 | 81.89 |
| MS225-24P | 448 | 1528.64 |
| MS225-48 | 42 | 143.31 |
| MS225-48LP | 490 | 1671.95 |
| MS225-48FP | 882 | 3009.51 |
| MS250-24 | 27 | 92.13 |
| MS250-24P | 434 | 1480.87 |
| MS250-48 | 44 | 150.13 |
| MS250-48LP | 480 | 1637.83 |
| MS250-48FP | 874 | 2982.21 |
| MS320-24 | 39 | 133.07 |
| MS320-24P | 454 | 1549.11 |
| MS320-48 | 55 | 187.67 |
| MS320-48LP | 480 | 1637.83 |
| MS320-48FP | 885 | 3019.75 |
| MS350-24 | 66 | 225.20 |
| MS350-24P | 466 | 1590.06 |
| MS350-24X | 867 | 2958.33 |
| MS350-48 | 63 | 214.96 |
| MS350-48LP | 478 | 1631.00 |
| MS350-48FP | 888 |
3029.98 |
| MS355-24X | 1793W | 6117.97 |
| MS355-24X2 | 1793W | 6117.97 |
| MS355-48X | 1793W | 6117.97 |
| MS355-48X2 | 1793W | 6117.97 |
| MS390-24 | 99 | 337.80 |
| MS390-24P | 554 | 1891.69 |
| MS390-24U | 990 | 3379.04 |
| MS390-24UX | 810 | 2763.83 |
| MS390-48 | 110 | 375.34 |
| MS390-48P | 555 | 1893.74 |
| MS390-48U | 845 | 2883.26 |
| MS390-48UX | 785 | 2680.24 |
| MS390-48UX2 | 844 | 2879.17 |
| MS410 | 50 | 170.61 |
| MS420 | 45 | 153.55 |
| MS425 | 98 | 334.39 |
MR Series
| Device Model | Watts @ Full Load | BTU/hr |
| OD2 | 12 | 40.95 |
| MR12 | 6.5 | 22.18 |
| MR16 | 10.5 | 35.83 |
| MR18 | 9.8 | 33.44 |
| MR24 | 12.5 | 42.65 |
| MR26 | 13.7 | 46.75 |
| MR30H | 25 | 85.30 |
| MR32 | 13.87 | 47.33 |
| MR33 | 11 | 37.53 |
| MR34 | 18 | 61.42 |
| MR36 | 15 | 51.18 |
| MR42 | 20 | 68.24 |
| MR44 | 30 | 102.36 |
| MR46 | 30 | 102.36 |
| MR52 | 21 | 71.65 |
| MR53 | 21 | 71.65 |
| MR56 | 30 | 102.36 |
| MR58 | 8 | 27.30 |
| MR62 | 6.5 | 22.18 |
| MR66 | 10.5 | 35.83 |
| MR72 | 13.87 | 47.33 |
| MR76 | 15 | 51.18 |
| MR84 | 21 | 71.65 |
| MR86 | 30 | 102.36 |
MV Series
| Device Model | Watts @ Full Load | BTU/hr |
| MV21 | 10.94 | 37.33 |
| MV22 | 12.95 | 44.19 |
| MV71 | 21.95 | 74.90 |
| MV72 | 25.5 | 87 |
MG Series
| Device Model | Watts @ Full Load | BTU/hr |
| MG21 | 10 | 34.12 |
| MG41 | 10 | 34.12 |
| MG51 | 10 | 34.12 |