独自の単位を定義してブラウザに保存し、相互に変換できます。工場現場や研究室、ゲーム専用単位にも最適。
| Unit | Value (in base) | Equivalent |
|---|
Pick any reference unit and assign it the value 1. Every other unit is expressed as "how many base units fit in one of mine." Conversion: value × (from_factor / to_factor).
Definitions are saved locally to your browser (no server). Share via copy-paste of the textarea.
Battery Life Runtime Calculator (mAh)
Calculate how long a battery lasts at a given current draw — mAh to hours, Wh, and screen-on time.
Fertilizer / Nutrient Dilution Calculator
Dilute liquid fertiliser concentrate to target PPM or EC for soil and hydroponics.
Paper Size Converter (A4 / Letter / B-Series / JIS)
Convert between ISO A/B/C, US Letter / Legal / Tabloid and Japanese JIS paper sizes in mm and inches.
Font Size Converter (pt, px, rem, em, %)
Convert font sizes between pt, px, rem, em and % for web and print typography.
Time Zone Overlap Calculator (Remote Teams)
Find overlapping productive hours across up to 8 time zones for distributed teams.
Word Count to Pages Converter (Book / Essay / Manuscript)
Estimate pages from word count by genre, font, size and spacing — novel, essay, manuscript, blog.
