Convex Programmer's Calculator vs SpeedQX

Easily convert between hexadecimal, decimal, octal, and binary. Calculate the two's complement of any number. Flip a number's bytes to switch its endianness. Bit-shift left and right. Bit indicators and word grouping make binary easier to read. Tap the number to copy, paste, and clear. Swipe left or right on the number to backspace.

SpeedQX measures your internet speed with technician-grade accuracy and retro style. Run download, upload, ping, and jitter tests against Cloudflare's global edge network, M-Lab's NDT7 infrastructure, or both at once — with confidence-weighted averaging, outlier filtering, and percentile breakdowns you can trust. DUAL-PROVIDER TESTING Most speed test apps rely on a single server. SpeedQX tests against two independent providers — Cloudflare and M-Lab NDT7 — and merges results using methodology-appropriate weights (Cloudflare 60% for bandwidth, NDT7 60% for latency). When results diverge by more than 30%, SpeedQX flags it — which can indicate ISP throttling or network congestion. TECHNICIAN-GRADE ACCURACY A dedicated latency engine fires 100+ pings before your speed test even starts, with a warm-up phase discarded to eliminate DNS/TCP/TLS setup noise. Bandwidth measurements go through a three-stage accuracy pipeline: slow-start discard, IQR outlier filtering, and modified trimean computation. Jitter uses the industry-standard RFC 3550 algorithm — the same one used by Zoom, FaceTime, and VoIP systems. ADVANCED DIAGNOSTICS - Bufferbloat detection grades your router A through F by measuring latency spikes under load — the #1 hidden cause of "fast but laggy" connections - Connection stability shows whether your speed is rock-steady or swinging wildly - Cloudflare AIM scores rate your connection for streaming, gaming, and real-time video call readiness - Latency percentiles (P50, P95, P99) show your typical ping AND your worst-case spikes - Tap any metric card for a plain-English explanation and color-coded quality assessment DNS CONNECTIVITY DIAGNOSTICS SpeedQX probes 12 major domains in parallel — Google, Cloudflare, Apple, Microsoft, Amazon, Netflix, GitHub, Wikipedia, Facebook, X, YouTube, and Reddit — with detailed per-probe DNS/TCP/TLS/TTFB timing breakdowns. Results expand automatically when your test finishes. RETRO CASSETTE TAPE INTERFACE A fully animated cassette tape mechanism with spinning reels that respond to your live throughput. Frosted glass controls, CRT scanline overlays, and a speaker grill pattern make every test feel like pressing play on your favorite mixtape. Set in the Guton Sans Serif typeface for a clean, geometric look. CONFIGURABLE & TRANSPARENT - Choose your test provider: Cloudflare, M-Lab NDT7, or both - Set test duration: auto, 15s, 30s, 1min, 2min, 5min, or 10min - Pick your speed unit: auto-detect, Mbps, Kbps, or Gbps - Auto-copy formatted results to clipboard when complete - Read the full "How It Works" article explaining every measurement technique - M-Lab tests require explicit data policy consent — your privacy is respected WHAT YOU GET - Download speed - Upload speed - Ping latency with P50/P95/P99 percentile breakdown - RFC 3550 jitter - Packet loss (NDT7) - Bufferbloat grade (A-F) - Connection stability rating - AIM quality scores (streaming, gaming, video calls) - DNS reachability across 12 domains with timing breakdown