Newly listed sites

Everyday calculation tools in one mobile app

A handheld-style scientific calculator for Android

Android scientific calculation with symbolic and graphical tools

A maintained HP-42S calculator simulator

An Android calculator with scientific mode and history

Notes, variables and arithmetic in a browser

Editable notes with live scientific calculations

Scientific expressions with dimensions checked as types

Natural-language calculation beside short notes

Household carbon arithmetic with visible assumptions

Air-travel carbon estimates with a published methodology

Emissions estimates for travel, homes and events

Personal emissions estimates with quick and detailed inputs

A map-tool collection for distances, areas and location lists

Geographic area, distance and travel-time map calculations

Map measurements, radii and geographic lookup tools

Route maps and great-circle distance calculations

Bicycle gearing comparisons with cadence and tyre information

Nutrient and water calculations for planted aquariums

Brew-day volumes, temperatures and efficiency calculations

Brewing recipe calculation across desktop and web

Recipe calculations connected to a brewing batch

Panel cutting layouts and cabinetry cost calculations

Online cutting plans with printable reports