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formula for D with numbers: G = 6.674×10⁻¹¹, M= 2×10³⁰, R= 7×10⁸, c=3×10⁸ D ≈ exp[6.674×10⁻¹¹×2×10³⁰/(7×10⁸×3²×10¹⁶)] ≈ exp(2.12×10⁻⁶) ≈ 1.000002. And you can calculate the time dilation near the Earth for M=5.97×10²⁴ kg and R=6.37×10⁶ m, using Wolfram calculator: Click on the image to try (use ^