How many K is 1 °C?
1 °C = 274.15 K
It is 274.15 K, so saying 274 K is fine — rounding is within 0.5%.
And how many °C is 1 K?
1 K = -272.15 °C
Formula: K = °C × 1 + 273.15
°C to K around this value
0.1 °C273.25K
0.2 °C273.35K
0.3 °C273.45K
0.4 °C273.55K
0.5 °C273.65K
0.6 °C273.75K
0.7 °C273.85K
0.8 °C273.95K
0.9 °C274.05K
1 °C274.15K
1.1 °C274.25K
1.2 °C274.35K
1.3 °C274.45K
1.4 °C274.55K
1.5 °C274.65K
1.6 °C274.75K
1.7 °C274.85K
1.8 °C274.95K
1.9 °C275.05K
2 °C275.15K