Exposure Calculator is a compact utility for photographers who need fast, reliable exposure math on the go: enter a known exposure (aperture, shutter speed, ISO), set two new parameters and the app automatically calculates the third so you can preserve exposure while changing depth of field, motion blur or noise. The tool supports stacked neutral density filters, a multi-second timer and bulb exposures, and runs ad-free without collecting personal data.
Key Features
Exposure Calculator computes shutter speed, aperture or ISO from any two input values to give instant equivalent exposures. It covers a wide numeric range: aperture f/1.0–f/360, shutter 480s–1/16000s, and ISO 0.4–3.2M. ND support lets you add up to three stacked filters, each up to 30 stops, selectable in 1, 1/2 or 1/3 stop increments with stop, density and ND-number display modes and an ND calibration tool. Long-exposure features include bulb mode up to 24 hours, a timer with alarm for exposures of four seconds or longer, and a night mode with multiple overlay colors. Workflow helpers include a reverse filter search, an optional reciprocity compensation wheel and unlimited presets, all within a privacy-focused interface.
Advantages
Exposure Calculator provides accurate and quick exposure matching when switching aperture, shutter or ISO to speed up on-location decisions. It is built for long-exposure photography with stacked ND handling, bulb timing and a timer for multi-second shots. Extremely wide ranges let you plan for extreme shutter speeds, apertures and ISO values in one tool, and the app is free of ads and designed with privacy in mind—the app does not collect personal data.
Disadvantages
The built-in timer only covers exposures of four seconds or longer so shorter timed exposures are not supported. The app requires manual entry of the starting exposure values and is a calculation tool rather than an automated meter or camera controller. ND stacking is limited to a maximum of three filters, which may restrict extremely heavy filtration setups.
Development Team
The app is developed and maintained by a small independent developer who offers a beta testing program and welcomes help translating the interface; the focus is on providing a reliable, privacy-conscious tool for photographers.
