{ "category": "Compatibility", "display_name": "LOGINV", "entry_kind": "built_in_function", "eval_api": { "method": "POST", "url": "https://handbook.dnacalc.com/api/eval" }, "function_id": "FUNC.LOGINV", "implementation_state": { "answer_bank": null, "detail": "Everything else matches (5 workbook cells). Last-bit means a finite number within 16 ULP of Excel's.", "dnacalc_commit": "9e1884369a678158dd82d3d74188daf986995e87", "in_catalogue": true, "state": "close", "state_label": "Close: last-bit deviations remain", "summary": "Close: 2 of 5 recorded answers differ in the last bits, worst 2 ULP", "workbook_corpus": { "cells": 5, "last_bit": 2, "matched": 3, "worst_ulp": 2 } }, "implementations": [ { "commit": "9e1884369a678158dd82d3d74188daf986995e87", "flavour": "excel-compatibility-candidate", "language": "Rust", "name": "CalcFunc", "own_code": [ "https://github.com/DnaCalc/DnaCalc/blob/9e1884369a678158dd82d3d74188daf986995e87/crates/calc-func/src/catalogue/distributions.rs#L93-L96" ], "repository": "https://github.com/DnaCalc/DnaCalc", "shared_code": [ "catalogue/distributions::nums", "ported/excel_numeric::binary_with", "ported/excel_numeric::excel_x87_mul", "ported/excel_numeric/x87::mul", "ported/normal_dist_common::phi_kernel", "ported/normal_log_family::validate_positive_sigma", "ported/normal_log_family::validate_probability_open_unit", "ported/normal_log_family::inverse_standard_normal_acklam_refined", "ported/normal_log_family::inverse_standard_normal", "ported/normal_log_family::lognorm_inv_kernel" ], "source": "https://github.com/DnaCalc/DnaCalc/blob/9e1884369a678158dd82d3d74188daf986995e87/crates/calc-func/src/catalogue/distributions.rs#L93-L96", "state": "close", "suite": null, "summary": "Close: 2 of 5 recorded answers differ in the last bits, worst 2 ULP" } ], "json_url": "https://handbook.dnacalc.com/api/functions/FUNC.LOGINV.json", "name": "LOGINV", "notes": [], "schema": "efh.function-reference/v1", "section_order": [ "what-it-does", "try-it", "quirks", "how-to-implement", "version-differences", "alternatives" ], "sections": { "alternatives": "\n[LOGNORM.INV](FUNC.LOGNORM.INV.md) is the modern spelling. [NORM.DIST](FUNC.NORM.DIST.md) describes the normal variable in log space.\n\n\n", "how-to-implement": "\n1. Validate the open probability interval and positive finite log-space spread.\n2. Obtain a standard-normal quantile `z` at `p`. The current candidate uses Acklam’s piecewise rational approximation followed by one Newton correction; that generic inverse is not an identified Excel inverse program.\n3. Form `t=mean+standard_dev*z` with the current binary64 multiplication and addition order.\n4. Call the measured public EXP chain on the stored `t`. The current code explicitly uses `excel_exp` here, rather than an arbitrary host exponential.\n\nAt `p=0.5`, the symmetric standard quantile is zero, so the calculation reduces to `EXP(mean)`. This explains both examples without settling the inverse approximation away from the median. Tail quantiles, input coercion and publication still need their own controls; a direct lognormal inverse library can have different intermediate values.\n\n\n", "quirks": "\nThe probability must be strictly between zero and one. Either endpoint, an out-of-range probability or a nonpositive standard deviation gives `#NUM!`; nonnumeric arguments give `#VALUE!`. The location may be negative: that describes positive values below one rather than negative output values.\n\nExtreme quantiles can overflow after exponentiation, or become so small that worksheet publication matters. A normal quantile in log space can be representable even when its exponential is not. Do not treat that outer exponential as harmless formatting.\n\n\n", "sources": "\n- [Microsoft: LOGINV function](https://support.microsoft.com/en-us/excel/functions/loginv-function), opened 6 November 2026; syntax, documented argument rules and errors.\n- [DnaCalc implementation](https://github.com/DnaCalc/DnaCalc/blob/da3ecc4fb19a3a5529708c311d0e8f05688ac165/crates/calc-func/src/ported/normal_log_family.rs); implementation steps and the limits identified in the text.\n\n", "try-it": "\n`=LOGINV(0.5,0,1)` returns `1`. Probability one half selects the median; the log-space median is zero and exponentiating it gives one.\n\n`=LOGINV(0.5,1,0.5)` is about `2.718281828459045`, the exponential of the log-space location one. Changing the positive spread does not move the mathematical median, although it changes other quantiles.\n\n\n", "version-differences": "\nNo same-input comparison between named Excel builds is recorded for this function here. The documented behaviour below is not a measurement of every Excel release.\n\n\n", "what-it-does": "\n`LOGINV(probability,mean,standard_dev)` returns the value `x` at a specified cumulative lognormal probability. The parameters describe **ln(X)**: `mean` is the location in log space and `standard_dev` its positive spread. They are not the arithmetic mean and standard deviation of the positive output variable. This is the compatibility spelling of LOGNORM.INV.\n\n\n" }, "signature": { "display": "LOGINV(probability, mean, standard_dev)", "parameters": [ { "description": null, "name": "probability", "optional": false, "repeats": false }, { "description": null, "name": "mean", "optional": false, "repeats": false }, { "description": null, "name": "standard_dev", "optional": false, "repeats": false } ], "trailing_repeats": false }, "sources": { "metadata": { "admission": { "label": "implemented", "reason": null }, "arity": { "max": 3, "min": 3 }, "category": "Compatibility", "classification": { "arg_preparation_profile": "RefsVisibleInAdapter", "coercion_lift_profile": "Custom", "determinism_class": "Deterministic", "error_collapse_profile": "None", "fec_dependency_profile": "RefOnly", "host_interaction_class": "None", "kernel_signature_class": "Custom", "rich_value_usage": "RichBlind", "surface_fec_dependency_profile": "RefOnly", "thread_safety_class": "SafePure", "volatility_class": "NonVolatile" }, "descriptions": { "long": null, "short": "Inverse of the cumulative lognormal distribution (older form)", "short_source": "dna-calc-own" }, "docs": { "english_description": "Returns the inverse of the lognormal cumulative distribution function", "microsoft_url": "https://support.microsoft.com/en-us/office/loginv-function-0bd7631a-2725-482b-afb4-de23df77acfe" }, "entry_kind": "built_in_function", "localized_family_names": null, "localized_names": [ { "locale": "ar-SA", "name": "LOGINV" }, { "locale": "bg-BG", "name": "LOGINV" }, { "locale": "cs-CZ", "name": "LOGINV" }, { "locale": "da-DK", "name": "LOGINV" }, { "locale": "de-DE", "name": "LOGINV" }, { "locale": "el-GR", "name": "LOGINV" }, { "locale": "en-AU", "name": "LOGINV" }, { "locale": "en-GB", "name": "LOGINV" }, { "locale": "en-US", "name": "LOGINV" }, { "locale": "es-ES", "name": "DISTR.LOG.INV" }, { "locale": "et-EE", "name": "LOGINV" }, { "locale": "fi-FI", "name": "LOGNORM.JAKAUMA.KÄÄNT" }, { "locale": "fr-FR", "name": "LOI.LOGNORMALE.INVERSE*" }, { "locale": "he-IL", "name": "LOGINV" }, { "locale": "hr-HR", "name": "LOGINV" }, { "locale": "hu-HU", "name": "INVERZ.LOG.ELOSZLÁS" }, { "locale": "id-ID", "name": "LOGINV" }, { "locale": "it-IT", "name": "LOGINV" }, { "locale": "ja-JP", "name": "LOGINV" }, { "locale": "ko-KR", "name": "LOGINV" }, { "locale": "lt-LT", "name": "LOGINV" }, { "locale": "lv-LV", "name": "LOGINV" }, { "locale": "nb-NO", "name": "LOGINV" }, { "locale": "nl-NL", "name": "LOG.NORM.INV" }, { "locale": "pl-PL", "name": "ROZKŁAD.LOG.ODW" }, { "locale": "pt-BR", "name": "LOGINV" }, { "locale": "pt-PT", "name": "INVLOG" }, { "locale": "ro-RO", "name": "LOGINV" }, { "locale": "ru-RU", "name": "ЛОГНОРМОБР" }, { "locale": "sk-SK", "name": "LOGINV" }, { "locale": "sl-SI", "name": "LOGINV" }, { "locale": "sr-Latn-RS", "name": "LOGINV" }, { "locale": "sv-SE", "name": "LOGINV" }, { "locale": "th-TH", "name": "LOGINV" }, { "locale": "tr-TR", "name": "LOGTERS işlevi" }, { "locale": "uk-UA", "name": "LOGINV" }, { "locale": "vi-VN", "name": "LOGINV" }, { "locale": "zh-CN", "name": "LOGINV" }, { "locale": "zh-HK", "name": "LOGINV" }, { "locale": "zh-TW", "name": "LOGINV" } ], "signature": { "display": "LOGINV(probability, mean, standard_dev)", "parameters": [ { "description": null, "name": "probability", "optional": false, "repeats": false }, { "description": null, "name": "mean", "optional": false, "repeats": false }, { "description": null, "name": "standard_dev", "optional": false, "repeats": false } ], "trailing_repeats": false }, "surface_name": "LOGINV", "version_marker": null, "xlcall": { "code": "291", "symbol": "xlfLoginv" } }, "microsoft": "https://support.microsoft.com/en-us/office/loginv-function-0bd7631a-2725-482b-afb4-de23df77acfe" }, "try_it": { "formula": "=LOGINV(0.5,0,1)" }, "url": "https://handbook.dnacalc.com/functions/LOGINV.html", "variants": [], "versions": [] }