/**
 * DOCX Module - Unit Conversion Utilities
 *
 * Conversion functions between common measurement units used in OOXML.
 */
/** Twips per inch (OOXML page measurements). */
export declare const TWIPS_PER_INCH = 1440;
/** Twips per point. */
export declare const TWIPS_PER_POINT = 20;
/**
 * Twips per centimeter, derived exactly from 1 inch = 2.54 cm = 1440 twips
 * (= 566.9291…). Using the exact factor — rather than the rounded 567 — keeps
 * metric page sizes aligned with their canonical twip values, e.g.
 * `cmToTwips(21)` → 11906 and `cmToTwips(29.7)` → 16838 (A4), matching
 * `A4_PAGE_WIDTH` / `A4_PAGE_HEIGHT` in constants.ts.
 */
export declare const TWIPS_PER_CM: number;
/** Twips per millimeter, derived exactly from {@link TWIPS_PER_CM}. */
export declare const TWIPS_PER_MM: number;
/** EMU (English Metric Units) per inch — DrawingML coordinate space. */
export declare const EMU_PER_INCH = 914400;
/** EMU per centimeter. */
export declare const EMU_PER_CM = 360000;
/** EMU per point. */
export declare const EMU_PER_POINT = 12700;
/** EMU per pixel at 96 DPI (CSS pixel). */
export declare const EMU_PER_PX = 9525;
/** Default chart width in EMU (6 inches). */
export declare const DEFAULT_CHART_WIDTH_EMU: number;
/** Default chart height in EMU (3.5 inches for c:chart). */
export declare const DEFAULT_CHART_HEIGHT_EMU: number;
/** Default ChartEx height in EMU (4 inches). */
export declare const DEFAULT_CHART_EX_HEIGHT_EMU: number;
/** Default wrap margin for inline drawings in EMU (≈0.125 inch). */
export declare const DEFAULT_WRAP_MARGIN_EMU = 114300;
/** Default `wp:anchor` `relativeHeight` (z-order) when not specified. */
export declare const DEFAULT_RELATIVE_HEIGHT = 251658240;
/** Convert inches to twips. */
export declare function inchesToTwips(inches: number): number;
/** Convert twips to inches. */
export declare function twipsToInches(twips: number): number;
/** Convert centimeters to twips. */
export declare function cmToTwips(cm: number): number;
/** Convert twips to centimeters. */
export declare function twipsToCm(twips: number): number;
/** Convert points to twips. */
export declare function ptToTwips(pt: number): number;
/** Convert twips to points. */
export declare function twipsToPt(twips: number): number;
/** Convert millimeters to twips. */
export declare function mmToTwips(mm: number): number;
/** Convert inches to EMU. */
export declare function inchesToEmu(inches: number): number;
/** Convert EMU to inches. */
export declare function emuToInches(emu: number): number;
/** Convert centimeters to EMU. */
export declare function cmToEmu(cm: number): number;
/** Convert EMU to centimeters. */
export declare function emuToCm(emu: number): number;
/** Convert points to EMU. */
export declare function ptToEmu(pt: number): number;
/** Convert pixels (at 96 DPI) to EMU. */
export declare function pxToEmu(px: number): number;
/** Convert EMU to pixels (at 96 DPI). */
export declare function emuToPx(emu: number): number;
/** Convert points to half-points (for w:sz). */
export declare function ptToHalfPoint(pt: number): number;
/** Convert half-points to points. */
export declare function halfPointToPt(hp: number): number;
/** Convert points to eighth-points (for border w:sz). */
export declare function ptToEighthPoint(pt: number): number;
/** Convert eighth-points to points. */
export declare function eighthPointToPt(ep: number): number;
/** Convert line multiplier to line spacing value (auto mode). */
export declare function lineMultiplierToSpacing(multiplier: number): number;
/** Convert line spacing value to multiplier (auto mode). */
export declare function spacingToLineMultiplier(spacing: number): number;
/** Convert percentage (0-100) to table width pct value. */
export declare function percentToTablePct(percent: number): number;
/** Convert table width pct value to percentage. */
export declare function tablePctToPercent(pct: number): number;