Convert 21 Milliseconds to Seconds

How long is 21 milliseconds? What is 21 milliseconds in seconds? 21 ms to s conversion.
21 Milliseconds =
0.021 Seconds
(exact result)
A millisecond is one thousandth of a second.
A second is the base unit of time. Originally, it was based on the length of the day, but it has since been standardized based on the radiation wavelength of caesium-133.
Milliseconds to Seconds Conversions
(some results rounded)
ms s
21.00 0.021
21.01 0.02101
21.02 0.02102
21.03 0.02103
21.04 0.02104
21.05 0.02105
21.06 0.02106
21.07 0.02107
21.08 0.02108
21.09 0.02109
21.10 0.0211
21.11 0.02111
21.12 0.02112
21.13 0.02113
21.14 0.02114
21.15 0.02115
21.16 0.02116
21.17 0.02117
21.18 0.02118
21.19 0.02119
21.20 0.0212
21.21 0.02121
21.22 0.02122
21.23 0.02123
21.24 0.02124
ms s
21.25 0.02125
21.26 0.02126
21.27 0.02127
21.28 0.02128
21.29 0.02129
21.30 0.0213
21.31 0.02131
21.32 0.02132
21.33 0.02133
21.34 0.02134
21.35 0.02135
21.36 0.02136
21.37 0.02137
21.38 0.02138
21.39 0.02139
21.40 0.0214
21.41 0.02141
21.42 0.02142
21.43 0.02143
21.44 0.02144
21.45 0.02145
21.46 0.02146
21.47 0.02147
21.48 0.02148
21.49 0.02149
ms s
21.50 0.0215
21.51 0.02151
21.52 0.02152
21.53 0.02153
21.54 0.02154
21.55 0.02155
21.56 0.02156
21.57 0.02157
21.58 0.02158
21.59 0.02159
21.60 0.0216
21.61 0.02161
21.62 0.02162
21.63 0.02163
21.64 0.02164
21.65 0.02165
21.66 0.02166
21.67 0.02167
21.68 0.02168
21.69 0.02169
21.70 0.0217
21.71 0.02171
21.72 0.02172
21.73 0.02173
21.74 0.02174
ms s
21.75 0.02175
21.76 0.02176
21.77 0.02177
21.78 0.02178
21.79 0.02179
21.80 0.0218
21.81 0.02181
21.82 0.02182
21.83 0.02183
21.84 0.02184
21.85 0.02185
21.86 0.02186
21.87 0.02187
21.88 0.02188
21.89 0.02189
21.90 0.0219
21.91 0.02191
21.92 0.02192
21.93 0.02193
21.94 0.02194
21.95 0.02195
21.96 0.02196
21.97 0.02197
21.98 0.02198
21.99 0.02199