Heat Flux Units Converter

Coversion factor: 1 W/m² = 0.001 kW/m²

Additional information

Heat flux is the amount of heat energy transferred through a unit area per unit time. It represents the rate at which heat is conducted, convected, or radiated across a surface. Heat flux is a fundamental concept in heat transfer and plays a key role in understanding how thermal energy moves from one place to another.

The standard unit for heat flux in the International System of Units (SI) is watts per square meter (W/m²). Other commonly used units include kilowatt per square meter (kW/m²), calorie per square centimeter per second (cal/cm²·s), and BTU per hour per square foot (BTU/h·ft²).

Heat Flux Conversion Factors

	kW/m²	W/m²	W/cm²	W/mm²	W/in²	W/ft²	BTU [IT]/s·in²	BTU [IT]/s·ft²	BTU [IT]/min·ft²	BTU [IT]/h·ft²	BTU [th]/s·in²	BTU [th]/s·ft²	BTU [th]/min·ft²	BTU [th]/h·ft²	kcal [IT]/h·m²	kcal [IT]/h·ft²	kcal [th]/h·m²	kcal [th]/h·ft²	cal [IT]/s·cm²	cal [IT]/min·cm²	cal [IT]/h·cm²	cal [th]/s·cm²	cal [th]/min·cm²	cal [th]/h·cm²	dyn/h·cm	erg/h·mm²	hp/ft²	PS/ft²	CHU/h-ft²
1 kW/m²	1	1000	0.1	0.001	0.64516	92.90304	0.0006114937	0.0880550918	5.2833055105	316.99833063	0.0006119031	0.0881140418	5.2868425097	317.21055058	859.84522786	79.882235598	860.4206501	79.935694073	0.0238845897	1.4330753798	85.984522786	0.0239005736	1.4340344168	86.04206501	3600000000	36000000	0.1245850288	0.1263129815	176.11018368
1 W/m²	0.001	1	0.0001	0.000001	0.00064516	0.09290304	6.114936933e-7	0.0000880551	0.0052833055	0.3169983306	6.119030683e-7	0.000088114	0.0052868425	0.3172105506	0.8598452279	0.0798822356	0.8604206501	0.0799356941	0.0000238846	0.0014330754	0.0859845228	0.0000239006	0.0014340344	0.086042065	3600000	36000	0.000124585	0.000126313	0.1761101837
1 W/cm²	10	10000	1	0.01	6.4516	929.0304	0.0061149369	0.8805509184	52.833055105	3169.9833063	0.0061190307	0.8811404183	52.868425097	3172.1055058	8598.4522786	798.82235598	8604.206501	799.35694073	0.2388458966	14.330753798	859.84522786	0.2390057361	14.340344168	860.4206501	36000000000	360000000	1.2458502883	1.263129815	1761.1018368
1 W/mm²	1000	1000000	100	1	645.16	92903.04	0.6114936933	88.055091841	5283.3055105	316998.33063	0.6119030683	88.114041829	5286.8425097	317210.55058	859845.22786	79882.235598	860420.6501	79935.694073	23.884589663	1433.0753798	85984.522786	23.900573614	1434.0344168	86042.06501	3600000000000	36000000000	124.58502883	126.3129815	176110.18368
1 W/in²	1.5500031	1550.0031	0.15500031	0.0015500031	1	144	0.0009478171	0.1364856653	8.1891399195	491.34839517	0.0009484517	0.136577038	8.1946222793	491.67733676	1332.7627687	123.81771281	1333.654675	123.90057361	0.037021188	2.2212712812	133.27627687	0.0370459632	2.2227577916	133.3654675	5580011160	55800111.6	0.1931071809	0.1957855129	272.97133065
1 W/ft²	0.0107639104	10.763910417	0.001076391	0.0000107639	0.0069444444	1	0.0000065821	0.0009478171	0.0568690272	3.4121416331	0.0000065865	0.0009484517	0.0569070992	3.4144259497	9.2552970049	0.8598452279	9.2614907983	0.8604206501	0.0002570916	0.015425495	0.9255297005	0.0002572636	0.015435818	0.9261490798	38750077.5	387500.775	0.0013410221	0.0013596216	1.8956342406
1 BTU [IT]/s·in²	1635.3398422	1635339.8422	163.53398422	1.6353398422	1055.0558526	151928.04278	1	144	8640	518400	1.0006694671	144.09640326	8645.7841958	518747.05175	1406139.1593	130634.60256	1407080.1702	130722.02533	39.059421091	2343.5652655	140613.91593	39.085560283	2345.133617	140708.01702	5887223432067	58872234321	203.73886139	206.56465123	288000
1 BTU [IT]/s·ft²	11.356526682	11356.526682	1.1356526682	0.0113565267	7.3267767543	1055.0558526	0.0069444444	1	60	3600	0.0069490935	1.0006694671	60.040168026	3602.4100816	9764.8552728	907.18474	9771.3900707	907.7918426	0.2712459798	16.274758788	976.48552728	0.271427502	16.285650118	977.13900707	40883496056	408834960.56	1.4148532041	1.4344767447	2000
1 BTU [IT]/min·ft²	0.1892754447	189.2754447	0.0189275445	0.0001892754	0.1221129459	17.58426421	0.0001157407	0.0166666667	1	60	0.0001158182	0.0166778245	1.0006694671	60.040168026	162.74758788	15.119745667	162.85650118	15.129864043	0.0045207663	0.2712459798	16.274758788	0.0045237917	0.271427502	16.285650118	681391600.93	6813916.0093	0.0235808867	0.0239079457	33.333333333
1 BTU [IT]/h·ft²	0.0031545907	3.1545907451	0.0003154591	0.0000031546	0.0020352158	0.2930710702	0.000001929	0.0002777778	0.0166666667	1	0.0000019303	0.0002779637	0.0166778245	1.0006694671	2.712459798	0.2519957611	2.7142750197	0.2521644007	0.0000753461	0.0045207663	0.2712459798	0.0000753965	0.0045237917	0.271427502	11356526.682	113565.26682	0.0003930148	0.0003984658	0.5555555556
1 BTU [th]/s·in²	1634.2457685	1634245.7685	163.42457685	1.6342457685	1054.35	151826.4	0.9993309808	143.90366123	8634.2196739	518053.18044	1	144	8640	518400	1405198.4252	130547.2055	1406138.8065	130634.56979	39.033289588	2341.9973753	140519.84252	39.059411292	2343.5646775	140613.88065	5883284766427	58832847664	203.60255618	206.42645551	287807.32246
1 BTU [th]/s·ft²	11.348928948	11348.928948	1.1348928948	0.0113489289	7.3218749998	1054.35	0.0069397985	0.9993309808	59.959858847	3597.5915308	0.0069444444	1	60	3600	9758.3223969	906.57781597	9764.852823	907.18451241	0.271064511	16.263870661	975.83223969	0.2712459117	16.274754705	976.4852823	40856144211	408561442.11	1.4139066401	1.4335170522	1998.6619616
1 BTU [th]/min·ft²	0.1891488158	189.14881579	0.0189148816	0.0001891488	0.12203125	17.5725	0.0001156633	0.0166555163	0.9993309808	59.959858847	0.0001157407	0.0166666667	1	60	162.63870661	15.109630266	162.74754705	15.119741873	0.0045177419	0.271064511	16.263870661	0.0045207652	0.2712459117	16.274754705	680935736.85	6809357.3685	0.0235651107	0.0238919509	33.311032693
1 BTU [th]/h·ft²	0.0031524803	3.1524802632	0.000315248	0.0000031525	0.0020338542	0.292875	0.0000019277	0.0002775919	0.0166555163	0.9993309808	0.000001929	0.0002777778	0.0166666667	1	2.7106451102	0.2518271711	2.7124591175	0.2519956979	0.0000752957	0.0045177419	0.271064511	0.0000753461	0.0045207652	0.2712459117	11348928.948	113489.28948	0.0003927518	0.0003981992	0.5551838782
1 kcal [IT]/h·m²	0.001163	1.163	0.0001163	0.000001163	0.0007503211	0.1080462355	7.111671654e-7	0.0001024081	0.0061444843	0.3686690585	7.116432684e-7	0.0001024766	0.0061485978	0.3689158703	1	0.09290304	1.0006692161	0.0929652122	0.0000277778	0.0016666667	0.1	0.0000277964	0.001667782	0.1000669216	4186800	41868	0.0001448924	0.000146902	0.2048161436
1 kcal [IT]/h·ft²	0.0125184278	12.518427815	0.0012518428	0.0000125184	0.0080763889	1.163	0.0000076549	0.0011023113	0.0661386787	3.9683207193	0.0000076601	0.0011030493	0.0661829563	3.9709773795	10.763910417	1	10.771113798	1.0006692161	0.0002989975	0.0179398507	1.0763910417	0.0002991976	0.0179518563	1.0771113798	45066340.133	450663.40133	0.0015596087	0.0015812399	2.2046226218
1 kcal [th]/h·m²	0.0011622222	1.1622222222	0.0001162222	0.0000011622	0.0007498193	0.1079739776	7.106915591e-7	0.0001023396	0.0061403751	0.3684225043	7.111673438e-7	0.0001024081	0.0061444859	0.368669151	0.9993312315	0.0928409094	1	0.09290304	0.0000277592	0.0016655521	0.0999331231	0.0000277778	0.0016666667	0.1	4184000	41840	0.0001447955	0.0001468038	0.204679169
1 kcal [th]/h·ft²	0.0125100559	12.510055884	0.0012510056	0.0000125101	0.0080709877	1.1622222222	0.0000076498	0.0011015741	0.0660944472	3.9656668314	0.0000076549	0.0011023116	0.0661386952	3.9683217149	10.756711852	0.9993312315	10.763910417	1	0.0002987976	0.0179278531	1.0756711852	0.0002989975	0.0179398507	1.0763910417	45036201.184	450362.01184	0.0015585657	0.0015801825	2.2031482397
1 cal [IT]/s·cm²	41.868	41868	4.1868	0.041868	27.01155888	3889.6644787	0.025602018	3.6866905852	221.20143511	13272.086107	0.0256191577	3.6891587033	221.3495222	13280.971332	36000	3344.50944	36024.091778	3346.7476394	1	60	3600	1.0006692161	60.040152964	3602.4091778	150724800000	1507248000	5.2161259871	5.2884719093	7373.3811704
1 cal [IT]/min·cm²	0.6978	697.8	0.06978	0.0006978	0.450192648	64.827741312	0.0004267003	0.0614448431	3.6866905852	221.20143511	0.000426986	0.0614859784	3.6891587033	221.3495222	600	55.741824	600.40152964	55.779127324	0.0166666667	1	60	0.0166778203	1.0006692161	60.040152964	2512080000	25120800	0.0869354331	0.0881411985	122.88968617
1 cal [IT]/h·cm²	0.01163	11.63	0.001163	0.00001163	0.0075032108	1.0804623552	0.0000071117	0.0010240807	0.0614448431	3.6866905852	0.0000071164	0.0010247663	0.0614859784	3.6891587033	10	0.9290304	10.006692161	0.9296521221	0.0002777778	0.0166666667	1	0.0002779637	0.0166778203	1.0006692161	41868000	418680	0.0014489239	0.00146902	2.0481614362
1 cal [th]/s·cm²	41.84	41840	4.184	0.04184	26.9934944	3887.0631936	0.0255848961	3.6842250426	221.05350256	13263.210153	0.0256020244	3.6866915101	221.20149061	13272.089436	35975.924334	3342.2727374	36000	3344.50944	0.9993312315	59.959873889	3597.5924334	1	60	3600	150624000000	1506240000	5.2126376063	5.2849351458	7368.4500853
1 cal [th]/min·cm²	0.6973333333	697.33333333	0.0697333333	0.0006973333	0.4498915733	64.78438656	0.0004264149	0.0614037507	3.6842250426	221.05350256	0.0004267004	0.0614448585	3.6866915101	221.20149061	599.59873889	55.704545623	600	55.741824	0.0166555205	0.9993312315	59.959873889	0.0166666667	1	60	2510400000	25104000	0.0868772934	0.0880822524	122.80750142
1 cal [th]/h·cm²	0.0116222222	11.622222222	0.0011622222	0.0000116222	0.0074981929	1.079739776	0.0000071069	0.0010233958	0.0614037507	3.6842250426	0.0000071117	0.001024081	0.0614448585	3.6866915101	9.9933123149	0.9284090937	10	0.9290304	0.000277592	0.0166555205	0.9993312315	0.0002777778	0.0166666667	1	41840000	418400	0.0014479549	0.0014680375	2.0467916904
1 dyn/h·cm	2.777777778e-10	2.777777778e-7	2.777777778e-11	2.777777778e-13	1.792111111e-10	2.58064e-8	1.698593593e-13	2.445974773e-11	1.467584864e-9	8.805509184e-8	1.699730745e-13	2.447612273e-11	1.468567364e-9	8.811404183e-8	2.388458966e-7	2.218950989e-8	2.390057361e-7	2.220435946e-8	6.63460824e-12	3.980764944e-10	2.388458966e-8	6.639048226e-12	3.983428936e-10	2.390057361e-8	1	1	3.460695245e-11	3.50869393e-11	4.891949547e-8
1 erg/h·mm²	2.777777778e-8	0.0000277778	2.777777778e-9	2.777777778e-11	1.792111111e-8	0.0000025806	1.698593593e-11	2.445974773e-9	1.467584864e-7	0.0000088055	1.699730745e-11	2.447612273e-9	1.468567364e-7	0.0000088114	0.0000238846	0.000002219	0.0000239006	0.0000022204	6.63460824e-10	3.980764944e-8	0.0000023885	6.639048226e-10	3.983428936e-8	0.0000023901	100	1	3.460695245e-9	3.50869393e-9	0.0000048919
1 hp/ft²	8.0266466155	8026.6466155	0.8026646615	0.0080266466	5.1784713304	745.69987158	0.0049082438	0.7067871049	42.407226294	2544.4335776	0.0049115297	0.7072602756	42.435616537	2546.1369922	6901.673788	641.186476	6906.292499	641.61556828	0.1917131608	11.502789647	690.1673788	0.1918414583	11.510487498	690.6292499	28895927816	288959278.16	1	1.0138696654	1413.5742098
1 PS/ft²	7.9168426566	7916.8426566	0.7916842657	0.0079168427	5.1076302083	735.49875	0.0048410994	0.6971183072	41.827098433	2509.625906	0.0048443403	0.697585005	41.8551003	2511.306018	6807.259378	632.41509028	6811.8149053	632.83831262	0.1890905383	11.345432297	680.7259378	0.1892170807	11.353024842	681.18149053	28500633564	285006335.64	0.9863200706	1	1394.2366144
1 CHU/h-ft²	0.0056782633	5.6782633411	0.0005678263	0.0000056783	0.0036633884	0.5275279263	0.0000034722	0.0005	0.03	1.8	0.0000034745	0.0005003347	0.030020084	1.8012050408	4.8824276364	0.45359237	4.8856950354	0.4538959213	0.000135623	0.0081373794	0.4882427636	0.0001357138	0.0081428251	0.4885695035	20441748.028	204417.48028	0.0007074266	0.0007172384	1

More Converters

References: National Institute of Standards and Technology (NIST). “Unit Conversion”. https://www.nist.gov/pml/owm/metric-si/unit-conversion. Bureau International des Poids et Mesures (BIPM). “The International System of Units (SI)”. https://www.bipm.org/en/measurement-units/. Wikipedia. “Heat flux”. https://en.wikipedia.org/wiki/Heat_flux.