21焦等於多少千卡？焦（亦稱“焦”，符號為：J）和千卡（亦稱“千卡”，符號為：kcal）是能量單位，它們之間的換算關係是：1焦等於0.0002389千卡。要將21焦轉換為千卡，我們可以透過焦與千卡換算比率來計算：
21 焦 = 21 * 0.0002389 千卡 = 0.0050169 千卡
因此，21焦換算成千卡的答案是21焦等於0.0050169千卡。
了解更多：21千卡等於多少焦? | 1焦等於幾千卡? | 1千卡等於幾焦?
| 焦 (J) | 千卡 (kcal) |
|---|---|
| 21.1 J | 0.00504079 kcal |
| 21.2 J | 0.00506468 kcal |
| 21.3 J | 0.00508857 kcal |
| 21.4 J | 0.00511246 kcal |
| 21.5 J | 0.00513635 kcal |
| 21.6 J | 0.00516024 kcal |
| 21.7 J | 0.00518413 kcal |
| 21.8 J | 0.00520802 kcal |
| 21.9 J | 0.00523191 kcal |
| 22 J | 0.0052558 kcal |
| 22.1 J | 0.00527969 kcal |
| 22.2 J | 0.00530358 kcal |
| 22.3 J | 0.00532747 kcal |
| 22.4 J | 0.00535136 kcal |
| 22.5 J | 0.00537525 kcal |
| 22.6 J | 0.00539914 kcal |
| 22.7 J | 0.00542303 kcal |
| 22.8 J | 0.00544692 kcal |
| 22.9 J | 0.00547081 kcal |
| 23 J | 0.0054947 kcal |
| 23.1 J | 0.00551859 kcal |
| 23.2 J | 0.00554248 kcal |
| 23.3 J | 0.00556637 kcal |
| 23.4 J | 0.00559026 kcal |
| 23.5 J | 0.00561415 kcal |
| 23.6 J | 0.00563804 kcal |
| 23.7 J | 0.00566193 kcal |
| 23.8 J | 0.00568582 kcal |
| 23.9 J | 0.00570971 kcal |
| 24 J | 0.0057336 kcal |
| 焦 (J) | 千卡 (kcal) |
|---|---|
| 24.1 J | 0.00575749 kcal |
| 24.2 J | 0.00578138 kcal |
| 24.3 J | 0.00580527 kcal |
| 24.4 J | 0.00582916 kcal |
| 24.5 J | 0.00585305 kcal |
| 24.6 J | 0.00587694 kcal |
| 24.7 J | 0.00590083 kcal |
| 24.8 J | 0.00592472 kcal |
| 24.9 J | 0.00594861 kcal |
| 25 J | 0.0059725 kcal |
| 25.1 J | 0.00599639 kcal |
| 25.2 J | 0.00602028 kcal |
| 25.3 J | 0.00604417 kcal |
| 25.4 J | 0.00606806 kcal |
| 25.5 J | 0.00609195 kcal |
| 25.6 J | 0.00611584 kcal |
| 25.7 J | 0.00613973 kcal |
| 25.8 J | 0.00616362 kcal |
| 25.9 J | 0.00618751 kcal |
| 26 J | 0.0062114 kcal |
| 26.1 J | 0.00623529 kcal |
| 26.2 J | 0.00625918 kcal |
| 26.3 J | 0.00628307 kcal |
| 26.4 J | 0.00630696 kcal |
| 26.5 J | 0.00633085 kcal |
| 26.6 J | 0.00635474 kcal |
| 26.7 J | 0.00637863 kcal |
| 26.8 J | 0.00640252 kcal |
| 26.9 J | 0.00642641 kcal |
| 27 J | 0.0064503 kcal |