Is Water Intake Calculator free to use?

Yes, Water Intake Calculator is completely free. No account, no sign-up, and no hidden fees required.

Does Water Intake Calculator work offline?

Water Intake Calculator runs entirely in your browser. Once the page is loaded, most features work without an internet connection.

Your data never leaves your device. All processing happens locally in your browser — nothing is uploaded to any server.

Health Tools

Calculate your daily water intake needs based on weight, activity level, and climate

1万人以上の開発者に利用されています

Body Weight

Activity Level

Climate / Environment

Output Unit

Daily Recommendation

3,263 ml

13.6

cups (240 ml)

6.5

500 ml bottles

Based on 35 ml/kg body weight adjusted for activity and climate. Includes water from all beverages and food.

身長と体重に基づいてボディマス指数と体重カテゴリを計算

年齢、体重、身長、活動レベルに基づいて1日のカロリー必要量を計算

米海軍方式で体脂肪率を計算 — メートル法・ヤード法対応、脂肪量と除脂肪体重の内訳付き

90分の睡眠サイクルに基づいて、最適な起床時間または就寝時間を見つける

最終月経日または受精日に基づいて、出産予定日、妊娠週数、妊娠期を計算

Calculate your max heart rate and 5 training zones by age — fat burn, cardio, and peak zones with target BPM ranges

コミュニティの声をもとに無料ツールを作っています。ワークフローに欲しい機能を提案してください。