Carbon Clock

Display I · Fast The Count

Hydrogen periods elapsed today

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since midnight UTC · —% of the day

Hydrogen periods this year

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since March equinox 2026 · —% of the year

Terran Date (UTC)

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Terran Time (UTC)

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hh : mm : ss

Day of Year

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of 365

Base oscillator: hydrogen hyperfine transition · 1,420,405,751.768 Hz · period 0.7040 ns
Every displayed value is an exact count of hydrogen periods divided to human scale.

Display II · Medium The Position

φ_ann (orbital angle) —

Kairos index K —

Season (N. hemisphere) —

Days since equinox —

Days to next equinox —

Display III · Slow The Sample Reader

Carbon-14 decay is a per-sample stopwatch, not a shared dial. Each organic sample has its own clock — it starts when the organism died and stopped exchanging carbon with the atmosphere. Enter a measured C-14/C-12 ratio to read elapsed hydrogen periods since that moment of isolation.

Examples:

NH standard · R₀ = 1.0 (Oxalic Acid II baseline, IntCal20)

C-14 / C-12 ratio (measured)

Sample name (optional)

Elapsed time

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Uncertainty (±40 yr half-life)

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Hydrogen periods elapsed

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Half-lives elapsed

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Method (NH): t = −t½ · ln(R / R₀) / ln(2) where t½ = 5,730 yr (Cambridge) and R₀ = 1.0 (IntCal20). The arithmetic conversion to hydrogen periods is exact; the elapsed-year value carries ±40 yr half-life uncertainty plus measurement uncertainty in the ratio itself. C-14 dating is reliable to ~55,000 years.

Ratio must be between 0.0001 and 1.2. Values above ~1.05 indicate modern contamination or a post-1950 sample.

The Carbon Clock