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Formula Library

Searchable knowledge base of formulas — each with its own page, linked tools, and related formulas.

22 formulas

Date & time (2)

2 matches· Date & time

Date & time

2
  • Time zone conversionInterpret the instant in the source IANA zone, then format it in the target zoneShow the same universal instant as local time in another zone.Specialty
  • Date and time formatsParse the timestamp, then reformat it for the selected date/time representationChange how a date-time is written without inventing a new instant (unless zone rules apply).Specialty

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  • Percentage proportionamount = (percent / 100) × whole→
  • Arithmetic and weighted meanmean = sum / count · weighted = Σ(x w) / Σw→
  • Exponentiationbase^exponent = result→
  • Fraction arithmetica/b ± × ÷ c/d → reduced form→
  • Number base conversionRead digits in the source base, then rewrite the same integer in the target base→
  • Wavelength and frequencyf = c / λ, with c ≈ 299,792,458 m/s (speed of light in vacuum)→

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  • Percentage proportionamount = (percent / 100) × whole
  • Arithmetic and weighted meanmean = sum / count · weighted = Σ(x w) / Σw
  • Exponentiationbase^exponent = result
  • Fraction arithmetica/b ± × ÷ c/d → reduced form
  • Number base conversionRead digits in the source base, then rewrite the same integer in the target base
  • Wavelength and frequencyf = c / λ, with c ≈ 299,792,458 m/s (speed of light in vacuum)
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