25 degrees Celsius = 77°F (exact). Rounded: 77°F. In Kelvin: 298.15 K. In Rankine: 536.67°R.
Comfortable warm — typical summer day in Europe and much of the US.
For context: 0°C = 32°F (freezing), 20°C = 68°F (room temp), 37°C = 98.6°F (body temp), 100°C = 212°F (boiling). The Celsius scale places 0° and 100° at the freezing and boiling points of water at sea level.
All temperature units: 77°F · 298.15 K (Kelvin) · 536.67°R (Rankine). Kelvin starts at absolute zero (−273.15°C). Rankine is used in some US engineering applications.
Formula: °F = (°C × 9/5) + 32. For 25°C: (25 × 1.8) + 32 = 45 + 32 = 77°F. Reverse: °C = (°F − 32) × 5/9 = (77 − 32) × 0.5556 = 25°C.
25°C = 77°F (exact: 77°F). Formula: (25 × 9/5) + 32 = 77°F.
Multiply by 1.8 then add 32: 25 × 1.8 = 45, + 32 = 77°F. Quick estimate: double the Celsius value and add 30 → 80°F (approximate).
Add 273.15: 25 + 273.15 = 298.15 K. Kelvin is used in science — 0 K is absolute zero (the coldest possible temperature).
Comfortable warm — typical summer day in Europe and much of the US. In Fahrenheit: 77°F is warm.