Last updated: 2026-04-27Contact: developer@captaincalc.com.tr
Reference basis: IMO/COLREG/STCW concepts, nautical practice, approved ship documents, and CaptainCalc calculation notes. Always verify operational decisions with official sources.
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Linear Interpolation Calculator
Calculate exact intermediate values from hydrostatic tables, tide tables, or any set of tabulated data.
Quick answer: when do you use linear interpolation?
Use linear interpolation when a hydrostatic, tide or correction table gives two surrounding values and the shipboard calculation needs the value between them.
- Enter x1 and y1 from the lower table row.
- Enter x2 and y2 from the upper table row.
- Enter the target x value to calculate the proportional y value between the two rows.
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CaptainCalc performs all these calculations instantly and offline — 523+ validated formulas, built by a former sea captain, right on your Android device.