Radiocarbon Date Calibrator

Convert radiocarbon years BP to approximate calendar age with uncertainty ranges and reservoir correction.

Radiocarbon Age

yr BP

± Uncertainty

Reservoir Correction

Tab to move between fields

Calibrated Age (cal BP)

3,725 cal BP

Calendar Date

1775 BCE

Corrected ¹⁴C Age3,500 yr BP

1σ Range (older)3,769 cal BP

1σ Range (younger)3,681 cal BP

2σ Range (older)3,813 cal BP

2σ Range (younger)3,637 cal BP

Remaining ¹⁴C65.48%

How to Use This Calculator

Enter Radiocarbon Age, ± Uncertainty, and Reservoir Correction.
Review Calibrated Age (cal BP) and Calendar Date.
Use Corrected ¹⁴C Age (yr BP) and 1σ Range (older) (cal BP) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

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