FPSPOT

FPSPOT is a free browser-based calculator site. It brings together age and date tools, numbers and money tools, investment calculators and gaming calculators on one site. The age section includes chronological age, age difference, age on a specific date, age by date of birth and pet age. The numbers and money section covers percentages, percentage increase and decrease, percentage off, percentage difference, rounding and CPM. Investment tools include NPV and IRR. Gaming tools include eDPI, cm/360, mouse sensitivity, DPI, FOV, and converters for Valorant, CS2 and Rainbow Six Siege. No sign-up is required, and inputs stay in your browser.