21千焦等于多少兆焦？千焦（或称“千焦”，单位符号是：kJ）和兆焦（或称“兆焦”，单位符号是：MJ）是能量单位，它们之间的换算关系是：1千焦等于0.001兆焦。要将21千焦转换为兆焦，我们可以通过千焦与兆焦换算比率来计算：
21 千焦 = 21 * 0.001 兆焦 = 0.021 兆焦
因此，21千焦换算成兆焦的答案是21千焦等于0.021兆焦。
了解更多：21兆焦等于多少千焦？ | 1千焦等于多少兆焦？ | 1兆焦等于多少千焦？
| 千焦 (kJ) | 兆焦 (MJ) |
|---|---|
| 21.1 kJ | 0.0211 MJ |
| 21.2 kJ | 0.0212 MJ |
| 21.3 kJ | 0.0213 MJ |
| 21.4 kJ | 0.0214 MJ |
| 21.5 kJ | 0.0215 MJ |
| 21.6 kJ | 0.0216 MJ |
| 21.7 kJ | 0.0217 MJ |
| 21.8 kJ | 0.0218 MJ |
| 21.9 kJ | 0.0219 MJ |
| 22 kJ | 0.022 MJ |
| 22.1 kJ | 0.0221 MJ |
| 22.2 kJ | 0.0222 MJ |
| 22.3 kJ | 0.0223 MJ |
| 22.4 kJ | 0.0224 MJ |
| 22.5 kJ | 0.0225 MJ |
| 22.6 kJ | 0.0226 MJ |
| 22.7 kJ | 0.0227 MJ |
| 22.8 kJ | 0.0228 MJ |
| 22.9 kJ | 0.0229 MJ |
| 23 kJ | 0.023 MJ |
| 23.1 kJ | 0.0231 MJ |
| 23.2 kJ | 0.0232 MJ |
| 23.3 kJ | 0.0233 MJ |
| 23.4 kJ | 0.0234 MJ |
| 23.5 kJ | 0.0235 MJ |
| 23.6 kJ | 0.0236 MJ |
| 23.7 kJ | 0.0237 MJ |
| 23.8 kJ | 0.0238 MJ |
| 23.9 kJ | 0.0239 MJ |
| 24 kJ | 0.024 MJ |
| 千焦 (kJ) | 兆焦 (MJ) |
|---|---|
| 24.1 kJ | 0.0241 MJ |
| 24.2 kJ | 0.0242 MJ |
| 24.3 kJ | 0.0243 MJ |
| 24.4 kJ | 0.0244 MJ |
| 24.5 kJ | 0.0245 MJ |
| 24.6 kJ | 0.0246 MJ |
| 24.7 kJ | 0.0247 MJ |
| 24.8 kJ | 0.0248 MJ |
| 24.9 kJ | 0.0249 MJ |
| 25 kJ | 0.025 MJ |
| 25.1 kJ | 0.0251 MJ |
| 25.2 kJ | 0.0252 MJ |
| 25.3 kJ | 0.0253 MJ |
| 25.4 kJ | 0.0254 MJ |
| 25.5 kJ | 0.0255 MJ |
| 25.6 kJ | 0.0256 MJ |
| 25.7 kJ | 0.0257 MJ |
| 25.8 kJ | 0.0258 MJ |
| 25.9 kJ | 0.0259 MJ |
| 26 kJ | 0.026 MJ |
| 26.1 kJ | 0.0261 MJ |
| 26.2 kJ | 0.0262 MJ |
| 26.3 kJ | 0.0263 MJ |
| 26.4 kJ | 0.0264 MJ |
| 26.5 kJ | 0.0265 MJ |
| 26.6 kJ | 0.0266 MJ |
| 26.7 kJ | 0.0267 MJ |
| 26.8 kJ | 0.0268 MJ |
| 26.9 kJ | 0.0269 MJ |
| 27 kJ | 0.027 MJ |