Density of water by temperature: table from 0 to 100 °C

The density of water changes with temperature. It is highest, 999.975 kg/m³, at about 4 °C and falls on either side: 998.206 kg/m³ at 20 °C and 965.319 kg/m³ at 90 °C.

0 to 50 °C

$T (^{\circ} C)$	$ρ (kg/m^{3})$	$ρ (g/cm^{3})$	$v (L/kg)$	$ρ (lb/ft^{3})$
$0.01$	$999.845$	$0.999845$	$1.000155$	$62.4183$
$1$	$999.903$	$0.999903$	$1.000097$	$62.4219$
$2$	$999.944$	$0.999944$	$1.000056$	$62.4245$
$3$	$999.968$	$0.999968$	$1.000032$	$62.4260$
$4$	$999.975$	$0.999975$	$1.000025$	$62.4264$
$5$	$999.967$	$0.999967$	$1.000033$	$62.4259$
$6$	$999.943$	$0.999943$	$1.000057$	$62.4244$
$7$	$999.904$	$0.999904$	$1.000096$	$62.4220$
$8$	$999.851$	$0.999851$	$1.000149$	$62.4186$
$9$	$999.783$	$0.999783$	$1.000217$	$62.4144$
$10$	$999.702$	$0.999702$	$1.000299$	$62.4093$
$11$	$999.607$	$0.999607$	$1.000393$	$62.4034$
$12$	$999.499$	$0.999499$	$1.000501$	$62.3967$
$13$	$999.379$	$0.999379$	$1.000622$	$62.3892$
$14$	$999.246$	$0.999246$	$1.000755$	$62.3809$
$15$	$999.101$	$0.999101$	$1.000900$	$62.3718$
$16$	$998.945$	$0.998945$	$1.001057$	$62.3621$
$17$	$998.777$	$0.998777$	$1.001225$	$62.3516$
$18$	$998.597$	$0.998597$	$1.001405$	$62.3404$
$19$	$998.407$	$0.998407$	$1.001595$	$62.3285$
$20$	$998.206$	$0.998206$	$1.001797$	$62.3160$
$21$	$997.995$	$0.997995$	$1.002009$	$62.3028$
$22$	$997.773$	$0.997773$	$1.002232$	$62.2889$
$23$	$997.541$	$0.997541$	$1.002465$	$62.2745$
$24$	$997.299$	$0.997299$	$1.002708$	$62.2594$
$25$	$997.048$	$0.997048$	$1.002961$	$62.2437$
$26$	$996.787$	$0.996787$	$1.003223$	$62.2274$
$27$	$996.517$	$0.996517$	$1.003495$	$62.2105$
$28$	$996.238$	$0.996238$	$1.003777$	$62.1931$
$29$	$995.949$	$0.995949$	$1.004067$	$62.1751$
$30$	$995.652$	$0.995652$	$1.004367$	$62.1565$
$31$	$995.346$	$0.995346$	$1.004676$	$62.1374$
$32$	$995.032$	$0.995032$	$1.004993$	$62.1178$
$33$	$994.709$	$0.994709$	$1.005319$	$62.0976$
$34$	$994.378$	$0.994378$	$1.005654$	$62.0770$
$35$	$994.039$	$0.994039$	$1.005997$	$62.0558$
$36$	$993.691$	$0.993691$	$1.006349$	$62.0341$
$37$	$993.336$	$0.993336$	$1.006709$	$62.0119$
$38$	$992.973$	$0.992973$	$1.007077$	$61.9893$
$39$	$992.602$	$0.992602$	$1.007453$	$61.9661$
$40$	$992.224$	$0.992224$	$1.007837$	$61.9425$
$41$	$991.839$	$0.991839$	$1.008229$	$61.9185$
$42$	$991.446$	$0.991446$	$1.008628$	$61.8939$
$43$	$991.045$	$0.991045$	$1.009036$	$61.8689$
$44$	$990.638$	$0.990638$	$1.009451$	$61.8435$
$45$	$990.223$	$0.990223$	$1.009873$	$61.8176$
$46$	$989.802$	$0.989802$	$1.010303$	$61.7913$
$47$	$989.373$	$0.989373$	$1.010741$	$61.7646$
$48$	$988.938$	$0.988938$	$1.011186$	$61.7374$
$49$	$988.496$	$0.988496$	$1.011638$	$61.7098$
$50$	$988.047$	$0.988047$	$1.012097$	$61.6818$

51 to 99 °C

$T (^{\circ} C)$	$ρ (kg/m^{3})$	$ρ (g/cm^{3})$	$v (L/kg)$	$ρ (lb/ft^{3})$
$51$	$987.592$	$0.987592$	$1.012564$	$61.6534$
$52$	$987.131$	$0.987131$	$1.013037$	$61.6245$
$53$	$986.662$	$0.986662$	$1.013518$	$61.5953$
$54$	$986.188$	$0.986188$	$1.014006$	$61.5657$
$55$	$985.707$	$0.985707$	$1.014500$	$61.5357$
$56$	$985.220$	$0.985220$	$1.015002$	$61.5053$
$57$	$984.727$	$0.984727$	$1.015510$	$61.4745$
$58$	$984.227$	$0.984227$	$1.016025$	$61.4433$
$59$	$983.722$	$0.983722$	$1.016547$	$61.4118$
$60$	$983.211$	$0.983211$	$1.017076$	$61.3798$
$61$	$982.693$	$0.982693$	$1.017611$	$61.3475$
$62$	$982.170$	$0.982170$	$1.018154$	$61.3149$
$63$	$981.641$	$0.981641$	$1.018702$	$61.2819$
$64$	$981.106$	$0.981106$	$1.019258$	$61.2485$
$65$	$980.566$	$0.980566$	$1.019819$	$61.2147$
$66$	$980.020$	$0.980020$	$1.020388$	$61.1806$
$67$	$979.468$	$0.979468$	$1.020962$	$61.1462$
$68$	$978.911$	$0.978911$	$1.021544$	$61.1114$
$69$	$978.348$	$0.978348$	$1.022132$	$61.0762$
$70$	$977.779$	$0.977779$	$1.022726$	$61.0408$
$71$	$977.205$	$0.977205$	$1.023326$	$61.0049$
$72$	$976.626$	$0.976626$	$1.023933$	$60.9688$
$73$	$976.042$	$0.976042$	$1.024546$	$60.9323$
$74$	$975.452$	$0.975452$	$1.025166$	$60.8955$
$75$	$974.857$	$0.974857$	$1.025792$	$60.8583$
$76$	$974.256$	$0.974256$	$1.026424$	$60.8208$
$77$	$973.651$	$0.973651$	$1.027062$	$60.7830$
$78$	$973.040$	$0.973040$	$1.027707$	$60.7449$
$79$	$972.424$	$0.972424$	$1.028358$	$60.7064$
$80$	$971.803$	$0.971803$	$1.029015$	$60.6677$
$81$	$971.177$	$0.971177$	$1.029679$	$60.6286$
$82$	$970.546$	$0.970546$	$1.030348$	$60.5892$
$83$	$969.910$	$0.969910$	$1.031024$	$60.5495$
$84$	$969.268$	$0.969268$	$1.031706$	$60.5094$
$85$	$968.622$	$0.968622$	$1.032394$	$60.4691$
$86$	$967.971$	$0.967971$	$1.033088$	$60.4285$
$87$	$967.315$	$0.967315$	$1.033789$	$60.3875$
$88$	$966.655$	$0.966655$	$1.034496$	$60.3463$
$89$	$965.989$	$0.965989$	$1.035208$	$60.3047$
$90$	$965.319$	$0.965319$	$1.035927$	$60.2629$
$91$	$964.643$	$0.964643$	$1.036652$	$60.2207$
$92$	$963.963$	$0.963963$	$1.037384$	$60.1783$
$93$	$963.279$	$0.963279$	$1.038121$	$60.1355$
$94$	$962.589$	$0.962589$	$1.038865$	$60.0925$
$95$	$961.895$	$0.961895$	$1.039614$	$60.0491$
$96$	$961.196$	$0.961196$	$1.040370$	$60.0055$
$97$	$960.493$	$0.960493$	$1.041132$	$59.9616$
$98$	$959.784$	$0.959784$	$1.041901$	$59.9174$
$99$	$959.072$	$0.959072$	$1.042675$	$59.8729$

Notes

Every value is computed with IAPWS-IF97, the industrial standard for water and steam, at one atmosphere (101.325 kPa). v is the specific volume, the inverse of density.

By IF97 the density peaks at about 3.96 °C. That is why a lake freezes from the top: the densest water, near 4 °C, sinks to the bottom.

Pressure barely changes the density of liquid water: at 10 bar it is less than 0.05% higher than at one atmosphere. For other temperatures and pressures, use the steam calculator.