Libraries tagged by calculation

Bagisto package — destination-based US sales tax via the self-hosted OpenSalesTax engine

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A simple way to accommodate, exchange and structorize data with objects

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Landed Cost API providing duty rates, calculation, and item harmonization. A set of sample requests are available as a [Postman Collection](https://www.getpostman.com/collections/ad308f6c9351a18c2c12). ## Basics ### Timestamps Timestamps should be formatted using ISO-8601 to the nearest second, in UTC e.g `2015-06-12T09:17:37Z` ### Expiries All Requests will have an associated timestamp. The validity for any request is 1 minute to account for any clock-skew. ## Authorization All API requests require an http header that contains your account ID and your account API Key. During account provisioning, you will be issued an API Key which you must supply with every request. ### Authorization Header To make an authorized API request, set the following HTTP header: `authorization: avalaraapikey id: key:`

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A PHP library for integrating with the VAT Sense API in WordPress, providing VAT validation, tax rate information, and currency conversion. Features WordPress transient caching and WP_Error support.

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A PHP library for integrating with the Google Distance Matrix API in WordPress, providing travel distance and time calculations between multiple origins and destinations. Features WordPress transient caching and WP_Error support.

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A PHP utility class for calculating geographical distances between coordinates using the Haversine formula

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AfterSalesPro.gr Shipping Module

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A PHP library for converting dates between the Gregorian calendar and Julian dates, with support for time precision down to seconds. Ideal for date manipulations, calendar conversions, and astronomical calculations.

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A PHP cart library for checkout calculations, summary and invoice generation.

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Library for the calculation of simple math expressions

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calculation cost from cart component

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Ledger-based e-wallet system for Laravel with secure wallet creation, atomic transfers, immutable transactions, and audit-friendly balance calculation. Built for fintech, SaaS platforms, and marketplaces requiring safe, extensible digital wallet infrastructure.

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Laravel-first workday and business-day calculation engine.

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Accurate calculation

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Token accounting, multi-provider cost calculation, and budget guardrails for PHP AI apps. Know what every LLM call costs and stop runaway spend before it happens.

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