RADIANS Function in SoftMaker PlanMaker 2026: Syntax, Examples & Troubleshooting

• Introduced: Documented by PlanMaker 2021; the original introduction version is not established.
• Availability: Documented in PlanMaker 2026. This is a supported-version reference, not a final working-version endpoint.
• Scope: The reference belongs to the 2026/NX manual family; availability in FreeOffice and individual mobile builds is not established here.
• Checked: October 14, 2026, against the official function reference. Documentation check; not a new native test.

A full turn measures 360 degrees or 2π radians. The function RADIANS converts a degree value to a radian value using the identity degrees × PI() / 180, which SoftMaker prints explicitly in its English PlanMaker 2026 documentation. RADIANS does not calculate SIN/COS itself; it supplies their preferred angle unit.

=RADIANS(Number)

The function has exactly one documented argument. Use DEGREES to convert the opposite way. SoftMaker’s vendor example RADIANS(180) returns π ≈ 3.14159.

Precision note: Decimal approximations are rounded for readability. The expressions with PI() are exact mathematical relationships, not assertions that stored floating-point values compare bit-for-bit equal.

Put Degrees, Radians, and Back to degrees in A1:C1. Enter 0, 30, 45, 90, 180, 270, 360 down A2:A8. Enter =RADIANS(A2) into B2 and fill down through B8. For a round-trip sanity check enter =DEGREES(B2) in C2 and copy through C8. Column B should be approximately 0, 0.523598776, 0.785398163, 1.570796327, 3.141592654, 4.712388980, 6.283185307. Column C should reproduce the degree inputs within small rounding tolerance; test e.g. =ABS(C2-A2)<0.000000001 rather than exact equality. This is an independent worksheet calculation specification, not evidence of actual PlanMaker execution.

Feed a degree angle into a trig formula. Enter angle 30 degrees in A2, then use =SIN(RADIANS(A2)) for 0.5, or =COS(RADIANS(A2)) for 0.866025403784…. Omitting RADIANS means SIN/COS use 30 radians, leading to a different answer. Both nested expressions follow the independently calculated mathematical formulas.

Calculate an arc length. A circle’s radius is 1.2 metres (A2) and central angle 60 degrees (B2). =A2*RADIANS(B2) yields an independently computed 1.256637061436 metres of arc length. This works because arc length = radius × angle in radians. Do not use radius × degrees directly.

Convert rotational speed. Enter angular speed 30 degrees per second in A2. =RADIANS(A2) yields 0.523598775598 radians per second. The conversion changes the angle unit but does not change the time unit; input units must be consistent for other time scales.

Inverse conversion. =DEGREES(RADIANS(120)) is mathematically 120 (allowing for tiny floating-point discrepancies). Be careful not to use RADIANS a second time on a value already in radians.

• Applying conversion twice: SIN(RADIANS(RADIANS(90))) incorrectly treats a radian value as degrees. Record your input units in the worksheet header and convert only once.
• An output near 1.57 instead of 90: This is likely correct! RADIANS(90) is an angle in radians. Use DEGREES for the reverse conversion.
• Negative and >360° inputs: Conversion mathematically remains defined, e.g. −90° is −π/2, and 450° is 5π/2; no wrapping/modulo occurs in the mathematical conversion. Exact native application behaviour for extremes still needs verification.
• Cells containing degree-symbol text such as "90°": Do not assume PlanMaker will strip symbols or automatically coerce the string. Keep numeric degrees in the source cell; put ° in a header or verified display format. The vendor’s RADIANS page does not enumerate text-coercion error codes.
• Missing/multiple arguments or malformed formulas: The vendor-documented syntax has exactly one numeric argument. Confirm the exact error response in your installed edition; no fabricated #VALUE!/#NUM! claim is made here.
• Decimal differences or unexpected literal parsing: Check SoftMaker’s configurable numeric separators and the worksheet locale; use the Formula → Function UI to inspect syntax.
• Round-trip difference in last digits: Floating-point conversions need tolerance comparisons rather than exact equality, particularly for non-special angles.

• DEGREES: radians to degrees
• SIN: sine
• COS: cosine
• TAN: tangent
• PI: mathematical constant

• PlanMaker 2026/NX: SoftMaker’s English function page documents the exact one-argument formula and its purpose. SoftMaker’s 2026 help is the primary basis for the PlanMaker-specific claims in this guide.
• PlanMaker 2024: The separate 2024 English reference describes the same one-argument signature and core calculation. That establishes documented continuity, not a tested equivalence across builds.
• Microsoft Excel: Microsoft’s own function reference also documents the same trigonometric/conversion operation and a single numeric angle argument. This is a documentation-level similarity. It does not establish identical handling of strings, empty cells, overflow, floating-point last digits or Excel file round-tripping.
• Edition/platform: The inspected PlanMaker 2026 English help is for the 2026/NX release family. Particular paid/free editions, Windows/macOS/Linux builds, mobile applications and configurations were not run. Do not infer per-edition availability merely from catalogue presence.
• Locale: Examples show English-function names, a period decimal point, and direct cell references. Each of these functions takes one argument, so these examples do not establish which separator a particular locale uses for multi-argument functions. SoftMaker documents configurable decimal/thousands separators and the Formula → Function dialogue. Check translated function names and locally accepted syntax in your installation before asserting locale equivalence.

Native validation checklist

Record the installed PlanMaker product/version/build, OS, edition, language/locale, calculation mode and workbook format. Enter the specified test cells; record displayed values with at least nine decimal places where relevant; inspect the formula bar rather than relying only on rounded displays. Test unexpected text and empty references in that native build to establish actual error behaviour. Save and reopen the native file, then independently verify .xlsx export/import and opening in an actual Excel build if the guide will promise interchange. None of these tests has been performed for this guide.

1. SoftMaker PlanMaker 2026/NX English manual, RADIANS function: exact argument order, mathematical purpose, and vendor-labelled examples. Inspected 2026-10-13.
2. SoftMaker PlanMaker 2024 English manual, RADIANS function: confirms same core documented signature and purpose. Inspected 2026-10-13.
3. Microsoft Excel help, Excel RADIANS function: independently documents Excel’s corresponding syntax and degree/radian convention. Inspected 2026-10-13; not PlanMaker runtime evidence.
4. SoftMaker 2026, Entering formulas: the equals sign and Formula → Function UI. Inspected 2026-10-13.
5. SoftMaker 2026, Editing and numeric separator settings: locale/system input display settings. Inspected 2026-10-13.
6. SoftMaker 2026, DEGREES and PI: related conversion and mathematical constant. Inspected 2026-10-13.