About
RulerNest is a free set of measuring and calculating tools that works in your browser. Its main tool is an on-screen ruler that is actually true to scale. Browsers don't know how big your screen is, so you hold any bank or ID card (85.60 × 53.98 mm) against the display once, match the outline, and the ruler shows real centimeters, millimeters and inches from then on. Alongside it are 22 single-purpose tools: a unit converter, ring size and shoe size converters, paper sizes in mm, inches and pixels, a screen size and PPI calculator, quick inch, cm, mm and feet converters, a circle and area calculator, a cooking converter, a printable ruler, Hijri date and VAT helpers, a font-size converter, and percentage, BMI, loan/EMI, age, date difference and tip and discount calculators. Each one does a single job and shows its work. No sign-up, no email, and nothing you type is sent to us. Available in English, French and Arabic (right-to-left), and fast on phones.