Units and Conversion

Linear Measurements

inch	feet	yards	centimeters	meters	kilometers	miles	MIL
1	0.083	0.028	2.540	0.0254	0.0000254	0.0000016	1015.95
12	1	0.333	30.480	0.3048	0.0003048	0.0001905	12191.41
36	3	1	91.441	0.9144	0.0009144	0.000571507	36574.59
0.394	0.033	0.011	1	0.01	0.0000100	0.0000063	399.9797
39.37	3.281	1.094	100	1	0.001	0.000625	39997.97
39370	3280.83	1093.600	100000	1000	1	0.625	39997968
62992	5249.33	1749.760	160000	1600	1.6	1	63996749
0.0010	0.000082	0.000027	0.0025	0.000025	0.000000025	0.000000016	1

Area Measurements

Sq. Inches	Sq. feets	Sq.Yards	Sq. Mts.	Acres	ha	Sq. km	Sq. Miles
1	0.00694	0.00077	0.00065	1.593x10-7	6.450x10-8	6.450 x 10-10	2.490x10-10
144.07	1	0.11117	0.09295	0.000023	9.293x10-6	9.293x10-8	3.587x10-8
1296	9	1	0.83613	0.000207	8.359x10-5	8.359x10-7	3.227x10-7
1550	10.76	1.19598	1	0.000247	9.997x10-5	9.997x10-7	3.859x10-7
6275753	43560	484240	4048.90	1	0.404786	0.004048	0.001562
15503876	107613.5	11962.87	10002.57	2.470	1	0.01	0.00386
1.55x10+9	10761349	1196286.73	1000256.516	247.04	100	1	0.386005
4.016x10+9	27878758	3099145.62	2591302.346	640.00	259.064	2.591	1

Volume Measurements

Cube inches	litres	US gallons	IMP Gallons	Cubic Feets	Cubic Yards	Cubic Meters
1	0.0164	0.00433	0.004	0.0006	0.0000214	0.00001639
61.024	1	0.264	0.219	0.0353	0.0013086	0.00100
231	3.785	1	0.830	0.1337	0.0049537	0.00379
278.31	4.561	1.205	1	0.1610	0.0059682	0.00456
1728.11	28.319	7.481	6.209	1	0.0370584	0.02833
46632.12	764.160	201.871	167.555	26.984	1	0.76451
60996.08	1000	264.052	219.166	35.296	1.308	1

Flow Measurements

lps	lpm	lph	m³/hr	US gpm	US gph	Imp. gpm	Imp. gph
1	60	3600	3.60	15.87	952.38	13.16	789.55
0.0167	1	60	0.06	0.26	15.876	0.219	13.16
0.0003	0.017	1	0.001	0.0044	0.2648	0.00366	0.219
0.2778	16.66	1000	1	4.4092	264.55	3.65	219.29
0.0630	3.78	226.8	0.227	1	60	0.829	49.74
0.0011	0.06	3.78	0.004	0.017	1	0.0138	0.829
0.0760	4.56	273.6	0.274	1.206	72.38	1	60
0.0013	0.076	4.56	0.005	0.020	1.21	0.0167	1

Pressure Measurements

kg/cm²	m of water	atm	KPa	bar	psi	m of Hg.	N/m²
1	10	0.967	98.039	0.98	14.225	0.7355	98033
0.1	1	0.097	9.804	0.098	1.422	0.0736	9803
1.034	10.336	1	101.333	1.013	14.703	0.7602	101327
0.01	0.102	0.01	1	0.01	0.145	0.0075	1000
1.02	10.2	0.987	100	1	14.509	0.7502	99993
0.07	0.7032	0.068	6.894	0.069	1	0.0517	6894
1.36	13.596	1.315	133.294	1.333	19.34	1	133285
0.0000102	0.000102	0.0000099	0.001	0.00001	0.000145	0.000008	1

Weight Measurements

lbs	kilograms	Quintals	Tonnes (Metric)	Tonnes (English)
1	0.43562	0.00436	0.000436	0.000499
2.2956	1	0.01	0.001	0.001144
229.56	100	1	0.1	0.114437
2295.59	1000	10	1	1.144362
2006	873.846	8.73846	0.873849	1

V-notch Discharge

Height of Water over 90º V-notch, cm	Discharge lps	Height of water over 90º V-notch, cm	Discharge lps
4	0.45	14	10.5
5	0.80	15	12.5
6	1.80	16	14.5
7	1.80	17	16.7
8	2.50	18	19.4
9	3.40	19	22.3
10	4.50	20	25.5
11	5.70	21	28.3
12	7.10	22	31.0
13	8.6	23	35.7

Filter Screen

Mesh No.	Opening Size
	Inch	mm	Micron
80	0.0069	0.177	177
100	0.0059	0.149	149
120	0.0049	0.125	125
150	0.0041	0.105	105
200	0.0037	0.094	74

Temperature

To convert ºC to ºF	To convert ºF to ºC
9/5ºC + 32 = ºF	5/9 (ºF - 32) = ºC